SkinPulse

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Women's fitness app with workout programs at various difficulty levels (from beginner to advanced), including HIIT, yoga, pilates, strength training, and programs for pregnant women. Requires a paid subscription after the free trial period ends.

The app offers interactive math lessons for children with level-based progression, but most content is behind a paid subscription (~1950 rubles/week). However, it systematically provides incorrect answers to basic arithmetic problems.

Sleepzy is a sleep tracking and smart alarm app that analyzes sleep phases using a microphone and motion sensor, but often displays inaccurate data and requires a paid subscription for most features.

Sleep problems?

A fitness training app for home and gym workouts with video tutorials and progress tracking, but it frequently crashes, requires a paid subscription for core features, and has a problematic interface.

Please note that this app offers English language learning only.

Ling is an app for learning 60+ languages (including Asian and Eastern European) with gamified lessons and speech recognition, but with unstable performance, high subscription costs, and content quality issues.