Comparison

iMemory vs WhenRedTap

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iMemory

Features
Read full description

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.

About

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.

Highlights
  • Reaction speed testing
  • Agility games
  • Leaderboard competition
  • Whack-a-Mole mini-game
  • Milliseconds precision tracking
Features
Read full description

Remember racing friends on a digital watch? Red Light Reflex turns that into a set of reaction games: tap the instant the screen turns green and find out how fast your nerves really are. SEVEN MODES, UNDER A MINUTE EACH • Green Light — wait on red, tap on green. Average of 5 rounds. • Stop or Go — tap on green, hold back on red and yellow. • Bubble Pop — the whole grid lights up. Pop every light. • Lights Out — five red lights go out. Launch like an F1 driver. • Stopwatch · Quick Split — start, stop, as fast as you can. • Stopwatch · Exactly 1.00 — stop at exactly one second. The digits vanish after half a second. • Stopwatch · Tap Burst — how many taps in 5 seconds? DAILY CHALLENGE One mode a day, the same random sequence for everyone in the world, first try only. Keep your streak and see where you rank. HONEST TIMING Measured from the frame the light actually appears to the moment your finger touches down, with 120 Hz ProMotion support. Waits are truly random — no rhythm to guess — and anything under 100 ms is a false start. LEADERBOARDS AND BADGES • Game Center leaderboards plus a daily board; weekly and monthly boards in the app • 20 badges to collect • Challenge friends directly on iOS 26 • React to other players’ scores with an emoji AND MORE • Six tiers: Overclocked, Lightning, Cheetah, Sharp, Human, Sloth • Skins: classic traffic lights or a retro seven-segment LCD • Light and dark mode • Share cards for your best results Green Light, Stop or Go and the Daily Challenge are free forever. Other modes can be bought one by one, or played free for 30 minutes after watching an ad. Pro unlocks every mode and skin — including future ones — with no ads. Terms of Use: https://redstop.netlify.app/terms Privacy Policy: https://redstop.netlify.app/privacy

Screenshots

iMemory4 screens
WhenRedTap4 screens

Verdict

The call

The clearest difference is update cadence: WhenRedTap at every 4 days against iMemory's monthly. On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. iMemory sells 1 one-off in-app purchase and WhenRedTap sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

iMemory ships an update monthly, WhenRedTap every 4 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard1 real difference · 8 level
iMemory versus WhenRedTap: the parameters behind the verdict, then further details
ParameteriMemoryWhenRedTap
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyMonthlyEvery 4 days — better
AdsYesYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size5 MB6 MB
Age rating4+4+
Developer景珂 陈泽 王

In-app purchases

1 purchases

iMemory

One-time1
  • iMemory Pro$1.99
2 purchases

WhenRedTap

One-time2
  • Remove Ads$0.99
  • Paid Unlock$0.99

Questions

Is iMemory free?
iMemory is free to download, with in-app purchases available.
Is WhenRedTap free?
WhenRedTap is free to download, with in-app purchases available.
Do iMemory or WhenRedTap have ads?
Both iMemory and WhenRedTap show ads.
Which is updated more often, iMemory or WhenRedTap?
iMemory ships an update monthly, and WhenRedTap every 4 days. Most recently, iMemory was updated on November 2, 2026 and WhenRedTap on November 3, 2026.

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