SubVox vs KeyFX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SubVox
This tool allows for hands-free content extraction and action triggering using voice commands. It processes audio locally by default, with optional cloud AI integration. Privacy is a core focus, with no storage or collection of user audio or text data.
- Voice-triggered context extraction
- Custom start and stop phrases
- On-device speech processing
- Optional conversational AI
- Background mode
- Third-party integrations
- watchOS companion app
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SubVox is a voice-activated content extraction tool with optional conversational AI features, designed for creators, performers, productivity users, and anyone who needs fast, hands-free action triggers. Speak your start and stop trigger phrases, and SubVox interprets the intent — then sends it to the third-party app or integration you choose. All audio and speech recognition is performed locally on your device by default. You may optionally choose to turn on Cloud Speech AI, which additionally can use AI provider cloud models for speech to text. SubVox does not store, track, or collect audio, transcripts, or extracted text. Features • Voice-triggered context extraction • Custom start and stop phrases • On-device speech processing • Optional conversational AI using user-provided AI provider credentials • Optional background mode when the screen is off • Third-party integrations including MysterSmith, Inject, and more • watchOS companion app • Secure storage of integration and AI credentials in Keychain Privacy First SubVox does not store audio, transcripts, or extracted text. If you choose to enable conversational AI, text is sent directly from your device to the AI provider you select using your own credentials. SubVox does not receive, store, or process this data on its own servers. Your data only leaves your device when you explicitly choose to send it and only to services you authorize. For Entertainment & Personal Utility SubVox is intended for entertainment and personal utility. It is not designed for professional, legal, medical, or safety-critical use.
KeyFX
This is a free, full-featured custom keyboard for iPhone that offers standard typing features like swipe typing and autocorrect. It also includes an optional performance toolkit for stage performers, allowing them to quickly insert prepared text and use custom integrations during a show.
- Swipe typing and autocorrect
- Multilingual layouts and themes
- Inline translation
- Text macros and clipboard helpers
- Optional performance toolkit
- Customizable text reveals
- Personal web service integrations
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KeyFX is a full-featured custom keyboard for iPhone, and it's free. It types like the built-in keyboard: swipe typing, autocorrect, every layout and language, adjustable height, one-handed mode, themes, and inline translation. Use it as your everyday keyboard and nothing else ever happens. KeyFX also includes an optional toolkit for stage performers who like to keep prepared text and their own integrations within reach during a show. These tools are entirely opt-in. They stay inactive until you switch on Performance Mode and set them up yourself, and KeyFX never sends your typing anywhere on its own. FREE KEYBOARD • Swipe typing, autocorrect, and multilingual layouts • Themes, key styles, adjustable height, one-handed edge • Hold space for a trackpad cursor; hold a key for alternate characters • Inline translation, powered by Google Translate • Text macros and clipboard helpers PERFORMANCE TOOLKIT — optional one-time in-app purchase • Insert a prepared line on cue for a reveal • Acrostic layout that spreads a chosen word down several lines • A suggestion-bar slot you fill from your own notes or your own web service • Personal integrations: connect a web address you own and send a line of text to it with a gesture. You enter every URL yourself; KeyFX ships with none • Text transforms: reverse, letter case, cipher and letter-map options • Ten saved configurations to switch between routines • Apple Watch companion face, and an optional link to the Impaler performance app PRIVACY Your typing stays on your device. KeyFX has no ads, no analytics, and no account. Full Access is used only for the clipboard, the translation feature, and haptic feedback. The app explains this in a full-screen notice the first time you open it, before anything else is available. The translation feature and any personal integration contact only the services you choose. Made by NahapetFX. Support and contact: nahapetfx.com
Screenshots
Verdict
The clearest difference is review sentiment: SubVox at 100% against KeyFX's 0%. SubVox also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 1). On price, ratings volume, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. KeyFX sells 1 one-off in-app purchase. SubVox asks for nothing beyond the download.
SubVox holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 100% of SubVox's written reviews are positive against 0% of KeyFX's.
| Parameter | SubVox | KeyFX |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 59 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Canfield | Nahapet Arshakyan |
Customer experience
SubVox
KeyFX
In-app purchases
SubVox
No in-app purchases
KeyFX
- KFX Magician Mode$299.99







