WatchSign vs Checkvoice
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
WatchSign
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WatchSign might be an app designed to help users learn sign language directly from their Apple Watch. It could provide lessons,sictionary, and interactive activities to facilitate learning.
Checkvoice
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CheckVoice is a vocal range analyzer and voice training app for anyone who wants to sing better. Core features are free to use. [Vocal Range Check] Just sing into the mic to instantly measure your full vocal range, from lowest to highest note. [Real-Time Tuner] See your pitch displayed as notes on a musical staff in real time. Visualize exactly what you are singing. [Voice Training] Strengthen your pitch accuracy and vocal control with interval training exercises. [Vocal Range Radar] Visualize your vocal range on a radar chart to understand your strengths and areas to improve. [Song Check] Compare a song's range with your vocal range to find out if you can sing it before you practice. [Progress & Comparison] Track your measurements over time and see how much your vocal range has improved. [Goal Song Training] Get a personalized training plan based on the range of the song you want to sing. ā Audio & Privacy All audio processing happens on your device. Recordings are never sent to external servers. Privacy Policy & Support: https://ys-digitalwork.com/support/checkvoice ā Subscription Core features are free. Additional features are available via subscription. Subscriptions are billed to your Apple ID and auto-renew unless cancelled at least 24 hours before renewal. Manage or cancel anytime in the App Store under Subscriptions. Access continues until the end of the current billing period after cancellation. Use Restore Purchases in the app after reinstalling. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Languages: ę„ę¬čŖ / English / ą¤¹ą¤æą¤Øą„ą¤¦ą„
Screenshots
Verdict
The clearest difference is update cadence: Checkvoice at weekly against WatchSign's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
WatchSign ships an update every 8 months, Checkvoice weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | WatchSign | Checkvoice |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Weekly ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 18.0 ā better | 18.6 |
| Further details ā not scored | ||
| Size | 14 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Jonathan Navarro | Satoshi Yamada |
In-app purchases
WatchSign
No in-app purchases
Checkvoice
No in-app purchases









