Comparison

Reaction Speed Reflex Trainer vs Stackfall

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

Head to head
About

Reaction Speed Reflex Trainer

Sharpen your reflexes and boost reaction speed with engaging game modes. Measure your reaction time to the millisecond, compete on global leaderboards, and track your progress. Ideal for improving focus, training reflexes, or simply for fun.

Highlights
  • Reaction time measurement
  • Multiple game modes
  • Global leaderboards
  • Progress tracking
  • Focus and reflex training
Features
Read full description

Boost your reaction speed and sharpen your reflexes with the ultimate Reaction Time Test app! Designed for simplicity and fun, this app puts your reaction time to the ultimate test. Tap the moment the screen changes from red to green and see your reactions measured down to the millisecond. Explore exciting game modes that challenge your reflexes and reaction skills: Classic Reaction Test: Tap the moment the screen turns green. Lights Out: Inspired by Formula 1, react to the lights turning off as quickly as possible. Chimp Test: Test your memory and reactions simultaneously in this unique challenge. Aim Game: Hit 30 targets as fast as you can to test your speed, precision, and reactions. The Hole: A fun twist that combines accuracy and reaction timing. Compete with others by climbing the reaction leaderboards and comparing scores with players worldwide. Track your reaction progress, smash your personal best, and see your reaction time improve with every game mode. Whether you’re improving focus, training reflexes, or just having fun, this app is the ultimate tool to train and test your reaction time. Download now to test, train, and dominate your reactions! EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stackfall

Features
Read full description

A crane swings your next block back and forth above the tower. That arc is fixed. You can't move the block, nudge it, or take it back. You choose exactly one thing: the moment you let go. That's the whole game. It is much harder than it sounds. TIMING, NOT PLACING The block keeps the crane's sideways speed as it falls — and the swing is fastest as it crosses the middle. So a dead-centre tap still drifts. Good players learn to lead the swing. Nobody tells you that; you work it out at about twenty metres, and everything changes. EVERY BLOCK IS SOMEBODY Each piece is a small character with a face and a temperament. They squint, they fret, they sweat as the tower sways. Land something heavy on one and it strains. Push your luck and they go from calm, to worried, to outright panic. The one that finally falls gets spiral eyes on the way down. THE MISTAKES GET HEAVIER The game never gets harder. No speed-ups, no dirty tricks, no rigged physics. Your structures just get taller — and everything you rushed at the bottom starts to matter. Gravity keeps honest books. UNLOCKS THAT HELP YOU CLIMB Height earns capability, not costumes. Wide decks to stabilise a wobble. Leaning blocks. A preview of what's coming next. Every unlock is a better way up. BANK YOUR BEST Cross a checkpoint and the bottom of your tower petrifies into permanent stone — a carved sandstone monument that grows with you. Every future run starts at that altitude. Progress you get to keep. SOMEBODY IS UP THERE Climb past the clouds and the sky starts noticing. A little guy on a cloud, eating mustard. A watcher who waves back — a bit more of him each time you reach him. A moon that wakes up and stares. A whale. A door, ajar, that never opens. Every sighting goes in your journal, and some of them are rare. JUST PLAY No accounts. No sign-in. No connection required. Anonymous analytics are optional — switch them off in Settings. Stackfall is a physics stacking game about balance, timing, and one honest input. It plays offline, it never sells you a way up, and every tower you build is one you actually earned. Tap to drop. Stack as high as you dare. Then watch it all come down.

Screenshots

Reaction Speed Reflex Trainer4 screens
Stackfall4 screens

Verdict

The call

The clearest difference is in-app purchases: Stackfall at none against Reaction Speed Reflex Trainer's 4. Stackfall also leads on update cadence (monthly vs every 3 months). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Reaction Speed Reflex Trainer sells 4 in-app purchases, starting at $0.99 per 7 days. Stackfall asks for nothing beyond the download.

UpkeepUpdate frequency

Reaction Speed Reflex Trainer ships an update every 3 months, Stackfall monthly. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

Scorecard2 real differences · 8 level
Reaction Speed Reflex Trainer versus Stackfall: the parameters behind the verdict, then further details
ParameterReaction Speed Reflex TrainerStackfall
PriceFreeFree
Rating4.6 (1.4K ratings) — better—
Positive reviews53.4% of reviews—
Number of ratings1.4K — better—
Update frequencyEvery 3 monthsMonthly — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.615.0 — better
Further details — not scored
Size27 MB65 MB
Age rating4+4+
DeveloperVicki PartridgeDevCraft

Bugs and requests

Reaction Speed Reflex Trainer

Reported bugs

3 issues
  • Reaction time not updating correctly
  • Crashes when trying to use paid features
  • Ads continue to show even after purchasing ad-free version

Requested features

3 requests
  • Track personal best reaction time
  • Add more game modes and challenges
  • Improve ad placement and reduce interruptions

Stackfall

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Reaction Speed Reflex Trainer

Subscriptions3
  • Weekly Subscription7 Days trial$0.997 Days
  • Monthly Subscription7 Days trial$4.991 Month
  • Yearly Subscription7 Days trial$9.991 Year
One-time1
  • Remove Ads$1.99
None

Stackfall

No in-app purchases

Questions

Is Reaction Speed Reflex Trainer free?
Reaction Speed Reflex Trainer is free to download, with in-app purchases available.
Is Stackfall free?
Stackfall is free to download, with no in-app purchases.
Do Reaction Speed Reflex Trainer or Stackfall have ads?
Both Reaction Speed Reflex Trainer and Stackfall show ads.
Which is updated more often, Reaction Speed Reflex Trainer or Stackfall?
Reaction Speed Reflex Trainer ships an update every 3 months, and Stackfall monthly. Most recently, Reaction Speed Reflex Trainer was updated on October 9, 2026 and Stackfall on September 30, 2026.

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