Comparison

SignDict vs iDev Tango

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

Head to head
About

SignDict

Explore Japanese and American Sign Language with this comprehensive dictionary and translator. Practice signing the alphabet, Hiragana, and more, even offline. Connect with Deaf communities and enhance your communication skills.

Highlights
  • Bilingual translation (ASL & JSL)
  • Interactive learning (alphabet, Hiragana)
  • Offline mode
  • Extensive sign library (20,000+ signs)
  • Distraction-free experience
Read full description

The world’s first Japanese Sign Language (JSL) and American Sign Language (ASL) dictionary and translation app. Discover a faster, easier way to learn and compare Japanese Sign Language and American Sign Language. Whether you’re a student, educator, interpreter, traveler, or simply interested in sign language, SignDict provides a modern learning experience designed exclusively for Apple platforms. Built entirely with SwiftUI, SignDict features a beautiful native interface, powerful search, offline access, and cross-platform support for iPhone, iPad, Mac, and Apple Vision Pro. Features • JSL ⇄ ASL Dictionary & Translation Explore thousands of signs with side-by-side translations between Japanese Sign Language and American Sign Language. • Fast Search Search instantly using English, Hiragana, Kanji, or Katakana to quickly find the sign you’re looking for. • Interactive Learning Learn through structured lessons, practice sessions, quizzes, Hiragana charts, Dakuon, Yōon, and more. • Compare Signs Side by Side Understand the differences between American and Japanese Sign Language with an easy-to-read comparison interface. • Offline Access Study anywhere—even without an internet connection. Perfect for travel, flights, classrooms, and everyday learning. • Designed for Apple Platforms Built entirely with SwiftUI and featuring Apple’s native Liquid Glass design for a fast, responsive, and beautiful experience across iPhone, iPad, Mac, and Apple Vision Pro. • Privacy First No accounts. No advertisements. Your learning stays private. • Active Development SignDict is continuously updated with new signs, improved illustrations, enhanced translations, and new learning features. Community Feedback Sign language evolves through its community. If you’d like to request a new sign or report a correction, you can submit feedback directly within the app by going to Settings → Feedback. Many improvements to the Japanese Sign Language dictionary have been made thanks to feedback from members of the Deaf community, helping SignDict become more accurate with every update. Thank you for helping make SignDict better.

About

iDev Tango

Features
Read full description

iDev Tangoは、AIを活用した次世代の単語帳アプリです。アプリエンジニアが技術用語を効率的に学習できるよう、最新のAI技術と直感的なUIを組み合わせました。 ・AI定義作成機能 AI定義作成機能により、技術用語の意味を瞬時に理解できます。わからない単語を入力するだけで、専門家レベルの説明を自動作成。iOS、Swift、SwiftUIの専門用語も、AIがわかりやすく解説します。 ・フラッシュカードで、効率的に学習 スワイプ操作で直感的に学習できるフラッシュカード機能。理解度に応じた復習システムで、覚えにくい用語も効率的に学習できます。 ・テーマ別整理で、体系的な学習 フォルダ機能で、テーマ別に単語を整理。iOS開発、Swift言語、SwiftUIなど、学習したい分野ごとに単語を分類できます。自分だけのカスタム単語帳を作成し、効率的に学習を進めましょう。 ・オフラインでも学習可能 一度ダウンロードした用語は、オフライン環境でも学習できます。通勤中や移動中など、インターネット接続がない環境でも、いつでもどこでも学習を続けられます。 こんな方におすすめ! ・iOSアプリ開発を学んでいる方 ・SwiftやSwiftUIの技術用語を覚えたい方 ・エンジニアとしてスキルアップしたい方 ・効率的な学習方法を探している方 ・技術書を読む際の用語集として活用したい方 iDev Tangoで技術用語に強いiOSエンジニアに!

Screenshots

SignDict4 screens
iDev Tango4 screens

Verdict

The call

The clearest difference is price: iDev Tango at Free against SignDict's $9.99. iDev Tango also leads on in-app purchases (none vs 2) and update cadence (every 2 days vs fortnightly). SignDict's advantage is ads (none vs shown) and device support (4 vs 2). On 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

iDev Tango is free to download; SignDict costs $9.99 up front. SignDict sells 2 in-app purchases, starting at $3.99 per month. iDev Tango asks for nothing beyond the download.

UpkeepUpdate frequency

SignDict ships an update fortnightly, iDev Tango every 2 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
SignDict versus iDev Tango: the parameters behind the verdict, then further details
ParameterSignDictiDev Tango
Price$9.99Free — better
Rating5.0 (9 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings9 — better—
Update frequencyFortnightlyEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad
Requires iOS17.4 — better17.6
Further details — not scored
Size457 MB5 MB
Age rating4+4+
DeveloperAntonio Chavezshohei yukawa

In-app purchases

2 purchases

SignDict

Subscriptions1
  • SignDict Subscription7 Days trial$3.991 Month
One-time1
  • SignDict Lifetime$9.99
None

iDev Tango

No in-app purchases

Questions

Is SignDict free?
SignDict costs $9.99, and also offers in-app purchases.
Is iDev Tango free?
iDev Tango is free to download, with no in-app purchases.
Do SignDict or iDev Tango have ads?
iDev Tango shows ads; SignDict does not.
Which is updated more often, SignDict or iDev Tango?
SignDict ships an update fortnightly, and iDev Tango every 2 days. Most recently, SignDict was updated on October 24, 2026 and iDev Tango on October 12, 2026.

Other comparisons