Comparison

iSigner vs SignTown Handbook

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Shanghai sign language dictionary
  • 4000 video signs
  • Influential sign language variant
  • Comprehensive vocabulary
Features
Read full description

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.

About

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.

Highlights
  • AI gesture detection
  • On-device machine learning
  • Privacy-focused (no video upload)
  • Educational content
  • Deaf Culture awareness
  • Webcam integration
Read full description

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

iSigner4 screens
SignTown Handbook4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. iSigner sells 1 one-off in-app purchase. SignTown Handbook asks for nothing beyond the download.

UpkeepUpdate frequency

iSigner ships an update every 5 months, SignTown Handbook monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
iSigner versus SignTown Handbook: the parameters behind the verdict, then further details
ParameteriSignerSignTown Handbook
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better11.0
Further details — not scored
Size27 MB43 MB
Age rating4+4+
DeveloperShanghai Suimeng Cultural Communication Co., LtdBIT STUDIO COMPANY LIMITED

Customer experience

iSigner

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

SignTown Handbook

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

iSigner

One-time1
  • 上海手语常用词库$12.99
None

SignTown Handbook

No in-app purchases

Questions

Is iSigner free?
iSigner is free to download, with in-app purchases available.
Is SignTown Handbook free?
SignTown Handbook is free to download, with no in-app purchases.
Do iSigner or SignTown Handbook have ads?
Neither iSigner nor SignTown Handbook shows ads.
Which is updated more often, iSigner or SignTown Handbook?
iSigner ships an update every 5 months, and SignTown Handbook monthly. Most recently, iSigner was updated on November 2, 2026 and SignTown Handbook on November 3, 2026.

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