diff --git a/ftl/.gitignore b/ftl/.gitignore
new file mode 100644
index 000000000..738260199
--- /dev/null
+++ b/ftl/.gitignore
@@ -0,0 +1,2 @@
+usage
+
diff --git a/ftl/remove-unused.sh b/ftl/remove-unused.sh
index f4d932157..73ec9f926 100755
--- a/ftl/remove-unused.sh
+++ b/ftl/remove-unused.sh
@@ -1,5 +1,14 @@
 #!/bin/bash
-
+#
+# To use, run:
+#
+# - ./update-ankimobile-usage.sh
+# - ./remove-unused.sh
+#
+# If you need to maintain compatibility with an older stable branch, you
+# can use ./update-desktop-usage.sh in the older release, then copy the
+# generated file into usage/ with a different name.
+#   
 # Caveats:
 #   - Messages are considered in use if they are referenced in other messages,
 #     even if those messages themselves are not in use and going to be deleted.
diff --git a/ftl/update-ankimobile-usage.sh b/ftl/update-ankimobile-usage.sh
index c14e56edc..e68620f04 100755
--- a/ftl/update-ankimobile-usage.sh
+++ b/ftl/update-ankimobile-usage.sh
@@ -7,7 +7,7 @@
 set -e
 
 scriptRoot=$(realpath $(dirname $0)/..)
-sourceRoot=$(realpath $scriptRoot/../mob/src)
+sourceRoot=$(realpath $scriptRoot/../../mobile/ankimobile/src)
 
 bazel run //rslib/i18n_helpers:write_ftl_json $scriptRoot/ftl/usage/ankimobile.json \
     $sourceRoot
diff --git a/ftl/usage/.gitignore b/ftl/usage/.gitignore
deleted file mode 100644
index f1be7f494..000000000
--- a/ftl/usage/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-desktop-head.json
diff --git a/ftl/usage/ankimobile.json b/ftl/usage/ankimobile.json
deleted file mode 100644
index fb4963acb..000000000
--- a/ftl/usage/ankimobile.json
+++ /dev/null
@@ -1,574 +0,0 @@
-[
-  "about-anki-written-by",
-  "about-license-text",
-  "about-please-see",
-  "about-some-thirdparty-libraries",
-  "about-thanks-contributors",
-  "about-thanks-for-support",
-  "about-the-anki-homepage",
-  "actions-actions",
-  "actions-add",
-  "actions-add-new",
-  "actions-add-short",
-  "actions-added-to-frequent-actions",
-  "actions-all-actions",
-  "actions-already-in-frequent-actions",
-  "actions-an-error-occurred",
-  "actions-answer-again",
-  "actions-answer-again-short",
-  "actions-answer-easy",
-  "actions-answer-easy-short",
-  "actions-answer-good",
-  "actions-answer-good-short",
-  "actions-answer-hard",
-  "actions-answer-hard-short",
-  "actions-are-you-sure",
-  "actions-auto-advance",
-  "actions-auto-advance-short",
-  "actions-bottom-bar",
-  "actions-bottom-bar-short",
-  "actions-browse",
-  "actions-browse-short",
-  "actions-bury-card-short",
-  "actions-bury-note-short",
-  "actions-cancel",
-  "actions-card-info",
-  "actions-card-info-short",
-  "actions-card-template",
-  "actions-card-template-short",
-  "actions-close",
-  "actions-confirm-delete",
-  "actions-current-audio-minus5s",
-  "actions-current-audio-minus5s-short",
-  "actions-current-audio-plus5s",
-  "actions-current-audio-plus5s-short",
-  "actions-custom-study",
-  "actions-custom-study-cant-be-used-on",
-  "actions-custom-study-short",
-  "actions-deck-statistics",
-  "actions-deck-statistics-short",
-  "actions-decks",
-  "actions-decks-short",
-  "actions-delete",
-  "actions-delete-note-short",
-  "actions-discard-changes",
-  "actions-done",
-  "actions-downloading",
-  "actions-drag-here-to-remove",
-  "actions-draw",
-  "actions-edit-short",
-  "actions-empty-short",
-  "actions-export",
-  "actions-file-invalid-or-corrupt",
-  "actions-filter",
-  "actions-filter-short",
-  "actions-filtercram",
-  "actions-flag-blue",
-  "actions-flag-green",
-  "actions-flag-number",
-  "actions-flag-orange",
-  "actions-flag-pink",
-  "actions-flag-purple",
-  "actions-flag-red",
-  "actions-flag-turquoise",
-  "actions-frequent-actions",
-  "actions-import",
-  "actions-leave-without-saving",
-  "actions-long-press-on-an-item-to",
-  "actions-mark",
-  "actions-mark-and-bury",
-  "actions-mark-and-bury-short",
-  "actions-mark-and-suspend",
-  "actions-mark-and-suspend-short",
-  "actions-mark-short",
-  "actions-new-name",
-  "actions-night-mode-short",
-  "actions-no-current-card",
-  "actions-no-load-restore-backup",
-  "actions-not-valid-link",
-  "actions-nothing-to-redo",
-  "actions-nothing-to-undo",
-  "actions-off",
-  "actions-off-short",
-  "actions-options",
-  "actions-options-for",
-  "actions-pause-audio-short",
-  "actions-please-tap-the-in-the",
-  "actions-preview",
-  "actions-processing",
-  "actions-rebuild",
-  "actions-rebuild-short",
-  "actions-record-voice",
-  "actions-record-voice-menu",
-  "actions-record-voice-short",
-  "actions-redo-short",
-  "actions-rename",
-  "actions-rename-deck",
-  "actions-replay-audio",
-  "actions-replay-audio-short",
-  "actions-replay-voice-short",
-  "actions-reset-card",
-  "actions-reset-card-short",
-  "actions-revert",
-  "actions-review-undone",
-  "actions-save",
-  "actions-scratchpad",
-  "actions-scratchpad-short",
-  "actions-scratchpad-size",
-  "actions-scratchpad-size-short",
-  "actions-search",
-  "actions-select-deck",
-  "actions-select-note-type",
-  "actions-set-due-date",
-  "actions-set-due-date-short",
-  "actions-show-answer-short",
-  "actions-show-answeranswer-good",
-  "actions-show-answeranswer-good-short",
-  "actions-study-options",
-  "actions-study-options-short",
-  "actions-suspend-card",
-  "actions-suspend-card-short",
-  "actions-suspend-note-short",
-  "actions-tools",
-  "actions-tools-overlay",
-  "actions-tools-short",
-  "actions-top-bar",
-  "actions-top-bar-short",
-  "actions-unbury-deck",
-  "actions-unbury-deck-short",
-  "actions-undo",
-  "actions-undo-short",
-  "adding-added",
-  "adding-cloze-outside-cloze-field",
-  "adding-cloze-outside-cloze-notetype",
-  "adding-the-first-field-is-empty",
-  "adding-you-have-a-cloze-deletion-note",
-  "browsing-added-today",
-  "browsing-again-today",
-  "browsing-any-flag",
-  "browsing-append",
-  "browsing-append-negated",
-  "browsing-card-updated",
-  "browsing-cards-deleted",
-  "browsing-cards-updated",
-  "browsing-change-deck",
-  "browsing-change-flag",
-  "browsing-change-note-type",
-  "browsing-change-notetype",
-  "browsing-clear-flag",
-  "browsing-clear-unused-tags",
-  "browsing-column1",
-  "browsing-column2",
-  "browsing-confirm-reset",
-  "browsing-current-deck",
-  "browsing-dd-selected",
-  "browsing-delete-notes",
-  "browsing-due-dateorder",
-  "browsing-due-reviews",
-  "browsing-ease",
-  "browsing-filtered",
-  "browsing-find",
-  "browsing-find-and-replace",
-  "browsing-interval",
-  "browsing-learning-cards",
-  "browsing-no-cards-are-selected",
-  "browsing-no-flag",
-  "browsing-note-created",
-  "browsing-note-updated",
-  "browsing-note2",
-  "browsing-notes-updated",
-  "browsing-question",
-  "browsing-questionandanswer",
-  "browsing-removed-unused-tags-count",
-  "browsing-repetitions",
-  "browsing-replace-with",
-  "browsing-reschedule",
-  "browsing-reset-cards",
-  "browsing-row-deleted",
-  "browsing-searching",
-  "browsing-second-column19",
-  "browsing-second-column91",
-  "browsing-select-all",
-  "browsing-sort",
-  "browsing-sort-field",
-  "browsing-sort-order",
-  "browsing-studied-today",
-  "browsing-suspended",
-  "browsing-tag",
-  "browsing-toggle-suspend",
-  "browsing-whole-collection",
-  "card-stats-note-type",
-  "card-templates-flip",
-  "card-templates-night-mode",
-  "card-templates-template-styling",
-  "custom-study-any-tag",
-  "custom-study-available",
-  "custom-study-cant-extend-limits-no-extra",
-  "custom-study-cram-seen-cards-with-certain-tags",
-  "custom-study-custom-study-session",
-  "custom-study-days-to-look-ahead",
-  "custom-study-days-to-look-back",
-  "custom-study-exclude-cards-with-tag",
-  "custom-study-extra-new-cards",
-  "custom-study-extra-review-cards",
-  "custom-study-include-cards-with-tag",
-  "custom-study-increase-todays-new-card-limit",
-  "custom-study-increase-todays-review-card-limit",
-  "custom-study-learn-new-cards-with-certain-tags",
-  "custom-study-loading",
-  "custom-study-max-cards-to-gather",
-  "custom-study-no-tags",
-  "custom-study-no-tags-available",
-  "custom-study-ok",
-  "custom-study-preview-all-cards-with-certain-tags",
-  "custom-study-preview-new-cards",
-  "custom-study-review-ahead",
-  "custom-study-review-due-cards-with-certain-tags",
-  "custom-study-review-forgotten-cards",
-  "custom-study-search-matches",
-  "custom-study-select",
-  "custom-study-study-type",
-  "custom-study-the-selected-options-did-not-match",
-  "database-check-rebuilt",
-  "database-check-title",
-  "deck-config-title",
-  "deck-config-used-by-decks",
-  "deck-options-add-options-group",
-  "deck-options-answer-time-cap",
-  "deck-options-bury-related-new-cards",
-  "deck-options-bury-related-reviews",
-  "deck-options-defaults",
-  "deck-options-delete-options-full-sync",
-  "deck-options-display-in-order-added",
-  "deck-options-display-in-random-order",
-  "deck-options-full-sync-required",
-  "deck-options-group-name",
-  "deck-options-max-new-per-day",
-  "deck-options-max-reviews-per-day",
-  "deck-options-new-cards",
-  "deck-options-options-group",
-  "deck-options-replay-q-audio-in-answer",
-  "deck-options-reset-all-settings-to-defaults",
-  "deck-options-restore-defaults",
-  "deck-options-steps",
-  "decks-a-deck-must-be-provided",
-  "decks-a-deck-named-already-exists",
-  "decks-add-empty-deck",
-  "decks-addexport",
-  "decks-build",
-  "decks-card-limit",
-  "decks-custom-steps",
-  "decks-deck",
-  "decks-deck-label",
-  "decks-deck-name",
-  "decks-deck-options",
-  "decks-download-link",
-  "decks-enable-second-filter",
-  "decks-export-collection",
-  "decks-filter2",
-  "decks-import-from-itunes",
-  "decks-link-to-apkg-file-to-import",
-  "decks-return-by-delete",
-  "decks-shared-deck-list",
-  "decks-study",
-  "decks-sync",
-  "decks-synchronize",
-  "decks-the-provided-deck-does-not-exist",
-  "decks-will-be-returned",
-  "editing-add-media",
-  "editing-bold",
-  "editing-cant-edit-original-image-data",
-  "editing-card-unsuspended",
-  "editing-discard",
-  "editing-discard-changes-question",
-  "editing-fields",
-  "editing-from-camera",
-  "editing-from-file",
-  "editing-from-photos",
-  "editing-italic",
-  "editing-keep-editing",
-  "editing-next-cloze",
-  "editing-next-field",
-  "editing-note-type-prompt",
-  "editing-note-unsuspended",
-  "editing-same-cloze",
-  "editing-tags",
-  "editing-unable-to-obtain-image",
-  "editing-unable-to-read-file",
-  "editing-underline",
-  "editing-unexpected-file-extension",
-  "editing-unexpected-rich-text-format-please",
-  "editing-unexpected-status-code",
-  "editing-unsuspend-card",
-  "editing-unsuspend-note",
-  "empty-cards-delete-button",
-  "empty-cards-delete-empty-cards",
-  "empty-cards-delete-empty-notes",
-  "empty-cards-deleted-count",
-  "empty-cards-deleting",
-  "empty-cards-not-found",
-  "empty-cards-window-title",
-  "errors100-tags-max",
-  "exporting-collection-saved-to-itunes",
-  "exporting-export-to-itunes",
-  "exporting-export-to-share-sheet",
-  "exporting-exporting",
-  "exporting-include-media2",
-  "exporting-media-files-exported-d",
-  "findreplace-notes-updated",
-  "importing-delete-imported-file",
-  "importing-import-complete",
-  "importing-importing",
-  "importing-no-apkg-or-colpkg-files-were",
-  "importing-overwrite-via-import",
-  "importing-please-choose-a-file",
-  "importing-processed-media-files-d",
-  "importing-replace-collection",
-  "media-check-check-media-action",
-  "media-check-delete-unused",
-  "media-check-delete-unused-complete",
-  "media-check-empty-trash",
-  "media-check-files-remaining",
-  "media-check-restore-trash",
-  "media-check-trash-emptied",
-  "media-check-trash-restored",
-  "media-check-window-title",
-  "media-error-initializing-recorder",
-  "media-error-playing-audio-full",
-  "media-privacy-microphone",
-  "media-recording",
-  "notetypes-back-field",
-  "notetypes-cloze-name",
-  "notetypes-front-field",
-  "preferences-about",
-  "preferences-always-duck-and-ignore-mute",
-  "preferences-answer-keeps-zoom",
-  "preferences-answer-side",
-  "preferences-audio-buttons",
-  "preferences-auto-advance-answer-action",
-  "preferences-auto-advance-answer-seconds",
-  "preferences-auto-advance-auto-advance-to-start",
-  "preferences-auto-advance-do-nothing",
-  "preferences-auto-advance-question-seconds",
-  "preferences-auto-advance-show-reminder",
-  "preferences-auto-advance-wait-for-audio",
-  "preferences-backup-available-backups",
-  "preferences-backup-create-now",
-  "preferences-backup-maximum-backups",
-  "preferences-backup-minutes-between-backups",
-  "preferences-backup-revert-to-backup",
-  "preferences-backup-revert-to-backup-confirm",
-  "preferences-backup-reverted-to-backup",
-  "preferences-backups",
-  "preferences-bottom-bar-size",
-  "preferences-bottom-center",
-  "preferences-bottom-left",
-  "preferences-bottom-right",
-  "preferences-button-d",
-  "preferences-collection-day-starts",
-  "preferences-collection-learn-ahead-minutes",
-  "preferences-collection-mix",
-  "preferences-collection-new-first",
-  "preferences-collection-newreview-order",
-  "preferences-collection-reviews-first",
-  "preferences-double-tap-prevention",
-  "preferences-drawing-screen-ignores-fingers",
-  "preferences-editing",
-  "preferences-editing-convert-smart-quotes",
-  "preferences-editing-crop-camera-photos",
-  "preferences-editing-max-image-size",
-  "preferences-editing-resize-on-paste",
-  "preferences-feedback-ticks",
-  "preferences-fine",
-  "preferences-force-sync-confirm",
-  "preferences-full-sync",
-  "preferences-gamepad-button-mapping",
-  "preferences-gamepad-menu-button",
-  "preferences-gamepads",
-  "preferences-height",
-  "preferences-huge",
-  "preferences-ignore-fingers",
-  "preferences-interrupt-current-audio",
-  "preferences-large",
-  "preferences-left",
-  "preferences-left-shoulder",
-  "preferences-left-thumbstick-button",
-  "preferences-left-trigger",
-  "preferences-logged-in-as",
-  "preferences-long",
-  "preferences-mid-center",
-  "preferences-mid-left",
-  "preferences-mid-right",
-  "preferences-never-show-scratchpad",
-  "preferences-never-show-scratchpad-enabled",
-  "preferences-never-type-answer",
-  "preferences-next-times",
-  "preferences-normal",
-  "preferences-notifications",
-  "preferences-notifications-alert-time",
-  "preferences-notifications-alert-when-due",
-  "preferences-notifications-app-icon-shows-due-count",
-  "preferences-notifications-settings-app-enable-notifications",
-  "preferences-paste-clipboard-images-as-png",
-  "preferences-pen-size",
-  "preferences-preferences",
-  "preferences-question-side",
-  "preferences-remaining-count",
-  "preferences-right",
-  "preferences-right-shoulder",
-  "preferences-right-thumbstick-button",
-  "preferences-right-trigger",
-  "preferences-scheduling",
-  "preferences-scratchpad-below-buttons",
-  "preferences-scratchpad-transparency",
-  "preferences-scratchpad-transparency-full",
-  "preferences-scratchpad-transparency-medium",
-  "preferences-scratchpad-transparency-none",
-  "preferences-scratchpad-transparency-slight",
-  "preferences-shake-action",
-  "preferences-short",
-  "preferences-show-bottom-bar",
-  "preferences-show-grid",
-  "preferences-show-top-bar",
-  "preferences-small",
-  "preferences-swipe-down",
-  "preferences-swipe-left",
-  "preferences-swipe-right",
-  "preferences-swipe-up",
-  "preferences-swipes",
-  "preferences-swipes-must-begin-from-the-far",
-  "preferences-sync-sounds-images",
-  "preferences-syncing",
-  "preferences-tap-to-sync",
-  "preferences-taps",
-  "preferences-theme",
-  "preferences-theme-bar-style",
-  "preferences-theme-black",
-  "preferences-theme-dark",
-  "preferences-theme-dark-translucent",
-  "preferences-theme-force-off",
-  "preferences-theme-force-on",
-  "preferences-theme-light-translucent",
-  "preferences-theme-night-mode-desc",
-  "preferences-theme-night-mode-same-as-system",
-  "preferences-theme-slate",
-  "preferences-thick",
-  "preferences-tools-overlay-button",
-  "preferences-tools-overlay-position",
-  "preferences-top-center",
-  "preferences-top-left",
-  "preferences-top-right",
-  "preferences-undo-clears-all",
-  "preferences-when-answer-shown",
-  "preferences-when-question-shown",
-  "preferences-you-have-been-logged-out",
-  "profiles-a-profile-with-that-name-already",
-  "profiles-add-profile",
-  "profiles-creating-backup",
-  "profiles-finishing-backup",
-  "profiles-please-provide-some-text-avoiding-symbols",
-  "profiles-please-select-another-profile-first",
-  "profiles-profile-name",
-  "profiles-profiles",
-  "profiles-rename-profile",
-  "profiles-unable-to-open-safari-please",
-  "profiles-user1",
-  "profiles-welcome",
-  "scheduling-automatically-play-audio",
-  "scheduling-easy-bonus",
-  "scheduling-easy-interval",
-  "scheduling-end",
-  "scheduling-forgot-cards",
-  "scheduling-general",
-  "scheduling-graduating-interval",
-  "scheduling-interval-modifier",
-  "scheduling-lapses",
-  "scheduling-leech-action",
-  "scheduling-leech-threshold",
-  "scheduling-maximum-interval",
-  "scheduling-minimum-interval",
-  "scheduling-new-cards",
-  "scheduling-new-interval",
-  "scheduling-order",
-  "scheduling-review",
-  "scheduling-reviews",
-  "scheduling-set-due-date-done",
-  "scheduling-set-due-date-prompt",
-  "scheduling-set-due-date-prompt-hint",
-  "scheduling-starting-ease",
-  "scheduling-steps-in-minutes",
-  "scheduling-tag-only",
-  "scheduling-update-button",
-  "scheduling-update-done",
-  "scheduling-update-later-button",
-  "scheduling-update-more-info-button",
-  "scheduling-update-soon",
-  "statistics-answer-buttons-title",
-  "statistics-reviews",
-  "studying-again",
-  "studying-answer-time-elapsed",
-  "studying-auto-advance-starting",
-  "studying-auto-advance-stopped",
-  "studying-bury-card",
-  "studying-bury-note",
-  "studying-card-suspended",
-  "studying-card-was-a-leech",
-  "studying-cards-buried",
-  "studying-delete-note",
-  "studying-easy",
-  "studying-edit",
-  "studying-empty",
-  "studying-finish",
-  "studying-good",
-  "studying-hard",
-  "studying-have-ready-to-study",
-  "studying-note-suspended",
-  "studying-pause-audio",
-  "studying-please-run-empty-cards-on-the",
-  "studying-please-use-record-voice-first",
-  "studying-replay-card",
-  "studying-replay-voice",
-  "studying-show-answer",
-  "studying-suspend-note",
-  "studying-type-in-the-answer",
-  "sync-abort-button",
-  "sync-cancel-button",
-  "sync-checking",
-  "sync-confirm-empty-download",
-  "sync-conflict-explanation",
-  "sync-connecting",
-  "sync-download-from-ankiweb",
-  "sync-downloading-from-ankiweb",
-  "sync-email-address",
-  "sync-log-out-button",
-  "sync-login",
-  "sync-media-aborted",
-  "sync-media-complete",
-  "sync-media-disabled",
-  "sync-media-failed",
-  "sync-media-is-syncing",
-  "sync-media-log-button",
-  "sync-media-log-title",
-  "sync-media-missing-file",
-  "sync-media-show-progress",
-  "sync-media-starting",
-  "sync-must-wait-for-end",
-  "sync-password",
-  "sync-please-enter-your-ankiweb-details",
-  "sync-upload-to-ankiweb",
-  "sync-uploading-to-ankiweb",
-  "sync-wrong-pass",
-  "undo-action-redone",
-  "undo-action-undone",
-  "undo-redo",
-  "undo-redo-action",
-  "undo-undo",
-  "undo-undo-action",
-  "urlscheme-a-note-type-must-be-provided",
-  "urlscheme-a-note-with-the-same-first",
-  "urlscheme-a-profile-must-be-provided",
-  "urlscheme-added-note",
-  "urlscheme-invalid-profile-name",
-  "urlscheme-the-provided-note-type-does-not",
-  "urlscheme-unable-to-open-profile"
-]
\ No newline at end of file