iSigner vs SignTown Handbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iSigner
This app provides the world's first and only comprehensive Shanghai sign language dictionary. It features a vocabulary of 4000 signs derived from extensive video content, influencing sign languages across China and other Asian regions.
- Shanghai sign language dictionary
- 4000 video signs
- Influential sign language variant
- Comprehensive vocabulary
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1. The first and only app of Shanghai sign language dictionary in the world. 2. iSigner 1.0 is featured with a vocabulary of 4000 Shanghai Sign language ( a variant of Chinese Sign Language) from hundreds of hours of original video, which has exerted great influence on most parts of China, and even the sign languages of Hong Kong, Taiwan, Singapore, Malaysia and other countries and regions.
SignTown Handbook
This educational app uses AI and your device's camera to detect sign language gestures. It aims to advance technology for the Deaf community and increase awareness of Deaf Culture through helpful learning experiences.
- AI gesture detection
- On-device machine learning
- Privacy-focused (no video upload)
- Educational content
- Deaf Culture awareness
- Webcam integration
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Project Shuwa is a collaboration between Google, Chinese University of Hong Kong, The Nippon Foundation and Kwansei Gakuin University, allowing us to work with native signers and academic researchers to authentically solve for the Deaf community. The mission of our project is to meaningfully advance technology for the Deaf community and sign language users, to increase awareness of Deaf Culture, and to create helpful, educational services and experiences along the way. We rely on breakthroughs AI technology to be able to detect sign language gestures using only a simple webcam and on-device machine learning. None of the video frames are sent through the Internet, which helps preserve user privacy.
Screenshots
Verdict
The clearest difference is review sentiment: SignTown Handbook at 100% against iSigner's 0%. SignTown Handbook also leads on in-app purchases (none vs 1) and update cadence (monthly vs every 5 months). On price, ads, device support and iOS requirement 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. iSigner sells 1 one-off in-app purchase. SignTown Handbook asks for nothing beyond the download.
iSigner ships an update every 5 months, SignTown Handbook monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | iSigner | SignTown Handbook |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 27 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Shanghai Suimeng Cultural Communication Co., Ltd | BIT STUDIO COMPANY LIMITED |
Customer experience
iSigner
SignTown Handbook
In-app purchases
iSigner
- 上海手语常用词库$12.99
SignTown Handbook
No in-app purchases
Questions
Is iSigner free?
Is SignTown Handbook free?
Do iSigner or SignTown Handbook have ads?
Which is updated more often, iSigner or SignTown Handbook?
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