iMemory vs WhenRedTap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iMemory
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iMemory is a brain training app built on classic cognitive science paradigms. Four powerful games target different aspects of your memory: • Dual N-Back — Train working memory with simultaneous visual and audio challenges. Recognize patterns from N steps back and push your limit higher. • Chimp Test — Test your spatial memory. Numbers flash briefly, then you recall them in order. Can you beat the chimpanzee? • Simon — Strengthen sequence memory. Follow an ever-growing pattern of colors and sounds. One more step each round. • Memory Match — Sharpen visual memory. Cards appear face up for a few seconds — memorize them, then flip to match every pair and clear the board. TRACK YOUR PROGRESS Every session is recorded. See your stats, streak days, and personal bests — all stored privately on your device. DESIGNED FOR DAILY USE Quick sessions, clean interface, and instant feedback make it easy to build a daily brain training habit. iMEMORY PRO Upgrade to iMemory Pro with a one-time, lifetime purchase and enjoy the full premium experience. No accounts required. No cloud sync. Your data stays on your device.
WhenRedTap
Test your reaction time with engaging stopwatch and agility games. Compete on leaderboards and enjoy classic arcade fun. Perfect for quick challenges and improving reflexes.
- Reaction speed testing
- Agility games
- Leaderboard competition
- Whack-a-Mole mini-game
- Milliseconds precision tracking
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Some worth-playing stopwatch games and agile games - Easy Mode: Click "Start," and when the countdown ends with the button turning red, quickly tap it to record your reaction speed. - Hard Mode: The button's outer circle serves as a hint with the prompt color. After starting the game, the button color changes to the prompt color. Quickly tap it to synchronize your reaction speed to the Game Center leaderboard. - 【Limited-time】Whack-a-Mole: Come and relish the childhood joy of popping bubbles, you won't be able to stop! The main purpose of this tool is to challenge your reaction limits and experience the difference in milliseconds firsthand. #Speed Challenge Tournament [Don't download!] [Don't download!] [Don't download!] But you won't listen, right? Don't blame us if you get addicted! The developers are already hooked, no time to slack off ^-^ That's life too, when you're about to get angry, just hit the pause button!
Screenshots
Verdict
The clearest difference is in-app purchases: iMemory at none against WhenRedTap's 2. WhenRedTap's advantage is ads (none vs shown) and update cadence (every 4 days vs monthly). On price, device support and iOS requirement 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. WhenRedTap sells 2 one-off in-app purchases. iMemory asks for nothing beyond the download.
iMemory ships an update monthly, WhenRedTap every 4 days. The most recent releases landed on August 31, 2026 and September 9, 2026 respectively.
| Parameter | iMemory | WhenRedTap |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 景珂 陈 | 泽 王 |
In-app purchases
iMemory
No in-app purchases
WhenRedTap
- Remove Ads$0.99
- Paid Unlock$0.99
Questions
Is iMemory free?
Is WhenRedTap free?
Do iMemory or WhenRedTap have ads?
Which is updated more often, iMemory or WhenRedTap?
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