Afterimage Memory vs PASSCODES
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Afterimage Memory
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Afterimage Memory is a simple brain-training game that challenges you to memorize numbers for a moment, then find the one that changed. Look at the numbers on the screen, remember their positions, and tap the number that is different from your memory. The rules are easy to understand, but each stage asks for sharper memory, wider visual attention, and faster reactions. Stage Mode lets you progress through 15 stages with increasing difficulty. As you clear stages, the number of items and grid density increase, creating a steady memory challenge. Score Challenge is built for high-score runs. Keep your streak alive, build combos, and aim for a new personal best. Game Center rankings, score sharing, and satisfying effects make it easy to return for daily brain training. Main features: - Tutorial stage explaining controls, score, difficulty, and time limit - 15-stage Stage Mode with progressive difficulty - Score Challenge for high-score runs - Combo display, best-score effects, and high-score celebration - Haptic feedback for correct and wrong answers - Sound and vibration settings - Game Center leaderboard support - Share your results Afterimage Memory is designed for quick sessions, spare moments, and daily memory training.
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!
Screenshots
Verdict
The clearest difference is ads: Afterimage Memory at none against PASSCODES's shown. Afterimage Memory also leads on update cadence (monthly vs every 2 months) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Afterimage Memory ships an update monthly, PASSCODES every 2 months. The most recent releases landed on September 8, 2026 and September 28, 2026 respectively.
| Parameter | Afterimage Memory | PASSCODES |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly β better | Every 2 months |
| Ads | No β better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 8 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | YUICHI NAKATANI | KENICHI YAMAMOTO |
In-app purchases
Afterimage Memory
No in-app purchases
PASSCODES
No in-app purchases





