Euler’s Number Memory Trainer vs Constant Challenge
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Euler’s Number Memory Trainer
Test your memory by memorizing digits of Euler's number. This app provides a simple and helpful interface to challenge your recall of this important mathematical constant.
- Memory skill testing
- Memorize digits of Euler's number
- User-friendly interface
- Simple and helpful design
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Euler's Number is an app that puts your memory skills to the test and helps you memorize as many digits of Euler’s number as possible. Euler's Number is an irrational mathematical constant, like pi. It was discovered by Leonhard Euler, who was a Swiss mathematician, physicist, astronomer, logician, and engineer of the 18th century. Euler's Number can be derived algebraically and has many useful applications in compound interest, probability theory, derangements, asymptotics, and calculus. Features: • A user-friendly interface. • Astonishingly simple and helpful. • We sincerely consider constructive feedback given in the app reviews.
Constant Challenge
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Constant Challenge is a training app designed to help you memorize mathematical constants like π (pi) and e while testing your skills through various challenge modes. Each constant offers the same set of game modes, allowing you to practice, compete, and improve your memory and speed. Features: - Practice Mode: Learn and memorize digits at your own pace - Time Attack Mode: Enter as many correct digits as possible within a time limit - Stage Mode: Progress through structured levels of increasing difficulty - Local Battle Mode: Competitive play possible Track your performance, challenge yourself, and aim for high scores. Perfect for students, math enthusiasts, and anyone who enjoys memory challenges. Note: This app focuses on memorization and training of mathematical constants.
Screenshots
Verdict
The clearest difference is in-app purchases: Euler’s Number Memory Trainer at none against Constant Challenge's 3. Euler’s Number Memory Trainer also leads on iOS requirement (11.2 vs 26.0). Constant Challenge's advantage is update cadence (every 2 days vs monthly). On price, ads and device support 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
Both are free to download. Constant Challenge sells 3 one-off in-app purchases. Euler’s Number Memory Trainer asks for nothing beyond the download.
Euler’s Number Memory Trainer ships an update monthly, Constant Challenge every 2 days. The most recent releases landed on October 24, 2026 and September 28, 2026 respectively.
| Parameter | Euler’s Number Memory Trainer | Constant Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 12 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Turk | Kaname Inoue |
In-app purchases
Euler’s Number Memory Trainer
No in-app purchases
Constant Challenge
- Unlock the Square Root of 2 (√2)$0.99
- Unlock the Golden Ratio (φ)$0.99
- Unlock the Euler–Mascheroni (γ)$0.99
Questions
Is Euler’s Number Memory Trainer free?
Is Constant Challenge free?
Do Euler’s Number Memory Trainer or Constant Challenge have ads?
Which is updated more often, Euler’s Number Memory Trainer or Constant Challenge?
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