Ranked by how well each one replaces Caramba on macOS — automatic correction, language coverage, price and privacy.
1.
Rekey
Top pick for Mac
macOS 13+ · Apple Silicon & Intel · Free · 34 languages
A native Swift app that auto-corrects text typed in the wrong layout as you go. The same core idea as Caramba, but free, on-device, and built for many languages rather than one pair. See how Rekey works →
Pros
- Free — no subscription, no account
- 34 languages vs Caramba's EN/RU focus
- Typing never leaves your Mac; respects password fields
- Native, lightweight; excludes terminals & code editors
Cons
- macOS only (no Windows/Linux)
- Still in beta
2.
Keyboop
macOS 13+ · free, open source (MIT) · Russian + English
A free, open-source macOS app that corrects Russian/English layout mistakes automatically as you type, with a manual hotkey and a flexible undo (last word, several words or a time window). It also bundles snippets, typo and Caps Lock fixes, and local dictation. Rekey vs Keyboop →
Pros
- Automatic correction plus a manual hotkey
- Open source (MIT), free, actively developed
- Extras: snippets, typo fix, dictation
Cons
- Russian and English only
- Requires macOS 14+ on Apple Silicon
3.
Lang Switcher
macOS 10.15+ · Mac App Store · free download; $7.99–11.99/yr or $23.99–29.99 lifetime
A Mac App Store utility, also listed as Smart Language Switcher, that detects the language you are typing and switches the layout automatically, with hotkeys and per-app exceptions. It ships language data for English, Russian, Ukrainian, German, French, Spanish, Italian and Polish.
Pros
- Automatic language detection and switching
- On the Mac App Store; runs on older macOS
Cons
- Full features require an in-app purchase
- Little public documentation; collects usage and diagnostic data (App Store privacy label)
4.
Boomkey
macOS 14+ · App Store: free (10 fixes/day), Pro $7.99 once · direct: $9.99 once
A macOS utility built around a manual fix: select text or press double-Shift and it converts the layout, for any installed layout pair. The direct-download edition adds automatic correction on Space in beta, for English with Ukrainian, Belarusian, Hebrew or Russian. Rekey vs Boomkey →
Pros
- Manual fix works with any installed layout pair
- Per-app rules in the direct edition
Cons
- Automatic correction is beta and limited to a few pairs
- The free App Store edition has a daily limit
5.
MLSwitcher
macOS · Mac App Store · shortcut-based
A long-standing Mac App Store tool that switches the layout of selected text via a shortcut. Good for deliberate, on-demand fixes rather than automatic correction.
Pros
- Established Mac App Store presence
- Good for manual switching
Cons
- Shortcut-based, not auto-fix
- No real-time detection as you type
6.
Flipio
macOS 14+ · open source (MIT) · free · manual (Option tap)
A minimal open-source utility: tap Option and it converts the selected text or the last typed word between your installed layouts. It does not detect the language, so every fix is triggered by you. Rekey vs Flipio →
Pros
- Simple, predictable one-key conversion
- Works with any installed layout pair
Cons
- No automatic detection
- Not notarized; replaces text via the clipboard
7.
Bzz
macOS · open source (GitHub) · free
A free, open-source layout switcher for macOS. A good pick if you value open source and do not mind installing from GitHub.
Pros
- Free and open source
- Inspectable, community-friendly
Cons
- No polished website or support
- Setup via GitHub; fewer languages
Comparison based on publicly available information, September 2026. Features and pricing may change — check each project before installing.
Rekey