| Core Identity |
| Developer | Kok Leong Tan | OCD Inc. | Glindemann, Sennoun, Langer GbR | Olecsii Chechel | Webtoweb | OCD Inc. | Doug Hicks |
| Category | Games | Education | Education | Education | Education | Education | Education |
| Platform | iOS | iOS, Android | iOS | iOS, Android | Android | iOS | iOS |
| Store Metrics |
| Rating | 3.6 / 5 | 0.0 / 5 | 4.5 / 5 | 4.7 / 5 | 4.5 / 5 | 0.0 / 5 | 1.0 / 5 |
| Ratings Count | 154 | 0 | 26 | 213 | 1,226 | 0 | 1 |
| Price | Free | Free | Free | Free | Free | Free | Free |
| Release Date | May 20, 2015 | Apr 25, 2026 | Aug 21, 2017 | Feb 15, 2018 | Oct 30, 2018 | Apr 24, 2026 | Jan 26, 2026 |
| Last Updated | Oct 2, 2015 | Apr 25, 2026 | May 5, 2026 | Jan 22, 2020 | Jan 9, 2026 | Apr 24, 2026 | Feb 15, 2026 |
| Sentiment & Reviews |
| Sentiment | mixed | positive | - | - | positive | - | - |
| Score | 50/100 | 75/100 | - | - | 85/100 | - | - |
| Praises | - | - Educational math exercises provide effective skill reinforcement for children across various primary grade levels
- Gamified learning structure keeps children engaged and motivated to complete multiple math problems daily
| - | - | - Simplicity and speed of the interface for quick homework checks
| - | - |
| Complaints | - | - UI layout issues cause text overlap and menu obstruction on specific mobile device screen sizes
- Systematic error notifications appear incorrectly after every answer regardless of the user input accuracy
| - | - | - Lack of advanced features like graphing or step-by-step logic
| - | - |
| Requests | - | - Timed challenge modes requested to introduce competitive elements and increase the difficulty for advanced students
| - | - | - | - | - |
| Strategic Intel |
| Strengths | - Platform-based combat mechanic differentiates the learning loop from static drill apps.
| - Focused arithmetic-fluency curriculum
- Distraction-free interface design
| - Distraction-free interface lowers cognitive load for rapid arithmetic verification
- Automated error detection differentiates the input experience from basic calculators
| - Open-source, ad-free architecture eliminates user-acquisition friction
- Direct-link social challenges enable peer-to-peer retention
- Column-math algorithms provide realistic, well-balanced exercises
| - Distraction-free interface minimizes cognitive load for single-result tasks
- Low-friction input workflow supports rapid utility usage
| - Distraction-free interface reduces cognitive load for children
- Column-based solving reinforces academic accuracy over guessing
| - Vocational simulation focus differentiates from generalist math apps
- One-time purchase model removes ad-based friction
|
| Weaknesses | - Zero content updates since 2015.
- Lack of parent-facing progress tracking.
- No social-competitive layer.
| - UI text-overlap issues on Android
- Persistent false-error pop-ups
- Subscription-gated progress tracking
| - Manual data entry model creates friction compared to AI-based photo scanning
- Lack of gamified retention loops limits long-term daily active usage
| - No character-led progression system to drive long-term engagement
- Absence of multi-language support restricts global market reach
- Lack of cloud-save functionality limits cross-device utility
| - Ad-supported model lacks premium retention features
- No symbolic math engine limits utility for higher-level courses
| - Subscription-only model for full utility limits conversion
- Lacks multi-device progress sync available in nemesis apps
| - Single-review count indicates negligible market penetration
- Lack of cloud-save functionality risks user progress
|
| Pricing | free | freemium | freemium | free | free | subscription | freemium |
| Momentum | Zombie | Maintenance | Maintenance | Zombie | Zombie | Maintenance | Maintenance |
| Update Cadence | 1 versions | 2 versions, 1 majors/6mo, ~89d avg | 1 versions | 5 versions, 1 majors/6mo, ~618d avg | 1 versions | 1 versions | 2 versions, 2 majors/6mo, ~17d avg |
