PASSCODES vs Speed Numbers
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
PASSCODES
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Aim for the world's number one instantaneous memory! Infinite Passcode is a super-simple game in which you simply memorize the passcode displayed on the screen and type it in. This game is perfect for activating the brain, improving memory, strengthening concentration. You can also see your memory rank in the world ranking. Please try it while you are on the move, in the middle of a boring meeting, or while waiting at the hospital!
Speed Numbers
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Speed Numbers: PAO System is a focused memory training app for people who use the PAO method to memorize numbers. Build and manage your 00โ99 PAO list, review your entries, test recall, practice number sequences, and train with a 300-digit Speed Numbers mode. You can also create Quick Cards for your own personal study material. Key features: โข 00โ99 PAO item management โข PAO review and recall testing โข Sequence Training โข Speed Numbers 300-digit training โข Time Attack โข Quick Cards for personal review โข Text-based export and import โข Local-first storage No account is required. No login is required. Your training data is primarily stored on your device.
Screenshots
Verdict
The clearest difference is ads: Speed Numbers at none against PASSCODES's shown. Speed Numbers also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | PASSCODES | Speed Numbers |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No โ better |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 17.0 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 16 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | KENICHI YAMAMOTO | Eddie Moon |
In-app purchases
PASSCODES
No in-app purchases
Speed Numbers
No in-app purchases
Questions
Is PASSCODES free?
Is Speed Numbers free?
Do PASSCODES or Speed Numbers have ads?
Which is updated more often, PASSCODES or Speed Numbers?
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