Free local AI
Ollama or LM Studio on your machine: your strings never leave it.
Being finalized for macOS · Windows next
The desktop localization tool for Flutter and iOS apps
LocalePilot opens your ARB, JSON, .strings and String Catalog files, finds missing keys and broken placeholders, translates with the AI of your choice, and writes your files back without silent overwrites. Everything stays on your machine.
- No account
- No mandatory cloud
- Files stay on your machine
- UI in 5 languages
Formats
Your translation files, as they are
LocalePilot reads and rewrites Flutter and Apple formats in their own style: ARB metadata, .strings comments, String Catalog states and plurals. A duplicate key is rejected at import, never overwritten.
Edit and translate your Xcode String Catalogs (.xcstrings) · Translate your Flutter ARB files with local AI
QA
QA that catches what the compiler lets through
A dropped placeholder compiles just fine, then renders wrong for your users. LocalePilot checks every translation against its source before export.
- ICU placeholders (
{name}, plurals, select) and{{name}} - printf and Apple:
%@,%1$@,%d,%lld,%.2f… - Missing or extra keys, empty values, copied source
- A blocking issue blocks export unless you explicitly override it
Export
Exports that never overwrite silently
Export is the only step that writes to disk. Before it does, you see exactly what will change.
- Review of changed files and remaining issues
- Three-way merge with the disk: if a file changed in the meantime, you decide value by value
- Backup of every replaced file in
.localepilot/backups/ - Export summary and a recovery journal if an export is interrupted
AI
The AI you choose, never mandatory
Import, checks, review and export work without AI. When you turn it on, you decide where your strings go.
Cloud AI, your key Pro
OpenAI, Anthropic, Gemini or DeepSeek, with your own API key.
Drafts to review
Every suggestion lands as an "AI draft to review". Nothing is approved without you.
Glossary Pro
Brand names and invariant terms protected, forbidden terms flagged by QA.
App Store · Pro
Your App Store listing, in every language
LocalePilot reads and writes your fastlane/metadata files: name, subtitle, promotional text, description and keywords. Apple's limits are checked as you type. Keywords are counted in bytes, the unit used by the App Store Connect documentation: an accented letter counts twice.
"Adapt with AI" starts from your source listing and adds no feature and no superlative. Uploading to Apple is still done by fastlane deliver or App Store Connect.
Free to start, Pro when your project grows
No subscription: Pro is a perpetual license. Payments by Polar.
Free
€0
- Every format
- 1 project, up to 300 editable keys
- Local AI (Ollama, LM Studio)
- QA and safe export
Pro trial
14 days
- Every Pro feature
- To try LocalePilot on a real project
Pro
Price announced at launch
- Perpetual license
- Unlimited projects and keys
- Cloud AI with your key
- Glossary and AI audit
- App Store listing
Past 300 keys, a project opens in discovery mode: you can browse it and review its QA, but editing, AI and export are locked.
Get notified at launch
LocalePilot is being finalized. Leave your email to hear about the launch and the price of the Pro plan.
FAQ
Is LocalePilot a translation service?
No. It is desktop software for developers. It provides no human translation, consulting or hosted localization service.
Where are my files stored?
On your machine. LocalePilot has no account and no server: it reads your project files and writes them back on export. Only the strings you send to a cloud AI provider leave your machine.
Which formats are supported?
Flutter ARB, nested JSON, Apple .strings, Xcode String Catalogs (.xcstrings) and multi-language JSON ({"en": {…}, "fr": {…}}), plus the fastlane files of your App Store listing.
Is AI required?
No. Import, QA, review and export work without AI. You can use free local AI (Ollama, LM Studio) or, with Pro, a cloud provider with your own API key.
What happens past 300 keys on the free plan?
The project opens in discovery mode: browsing and QA stay available; editing, AI and export need Pro or the 14-day trial.
Which platforms?
macOS first. A Windows version is planned next.
When will LocalePilot be available?
The app is being finalized. Join the waitlist to hear about the launch.