ThirtyB

Harald Kohlmann Education iPhoneiPadiPod touch

ThirtyB is a free Education app for iPhone and iPad by Harald Kohlmann. Rated 5.0/5 from 3 ratings. Requires iOS 18.2. Updated May 22, 2026.

Rating: 5.0; 3 ratings
Price: Free; on the App Store
Size: 22 MB; Age 4+
Updated: May 22; 2026 · v1.4.1

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About ThirtyB

Modeled after U.S. standardized test formats, it challenges users with synonym-based multiple-choice questions across five unique modes. Each day, players get 30 minutes to earn points, climb leaderboards, and master over 3,000 words using adaptive learning, spaced repetition, and instant feedback. With analytics, social accountability, and handwriting-powered bonus boosters, ThirtyB makes deep learning fast, focused, and fun. Terms of Use: https://30b.ai/?page_id=71 Privacy Policy: https://30b.ai/?page_id=3#

What’s new

Version 1.4.1 · Updated May 22, 2026

Bug fixes

App privacy

The developer, Harald Kohlmann, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

App details

ThirtyB is a free Education app for iPhone, iPad and iPod touch, developed by Harald Kohlmann. It is rated 5.0 out of 5 from 3 ratings on the App Store, requires iOS 18.2 or later and is 22 MB to download. It was first released on December 4, 2025 and last updated on May 22, 2026.

Category: Education
Rating: 5.0 / 5 (3 ratings)
Price: Free
Version: 1.4.1
Size: 22 MB
Requires: iOS 18.2 or later
Compatibility: iPhone, iPad, iPod touch
Languages: English
Age rating: 4+
Released: December 4, 2025
Last updated: May 22, 2026
Developer: Harald Kohlmann

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Alternatives to ThirtyB

Looking for apps like ThirtyB? Here are 6 similar apps on the App Store. The highest rated is Operation Math Game (4.5/5), and 5 of the 6 are free to download.

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