Reaction Test vs Spall Field
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Reaction Test
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How fast are your reflexes? Reflex Rush times every tap and gives you the number — your average reaction in milliseconds, run after run, charted so you can see whether you are actually getting faster. Each round lasts 30 seconds. Targets appear and shrink; hit them to build a combo, hit them dead centre for a Perfect, and drive the multiplier up through Fever and Overdrive before the clock runs out. WHAT'S IN IT • Four endless modes — Standard, Sudden Death, Marathon and Bullseye — unlocked as you level up • A 20-level challenge ladder across four themed chapters, one to three stars per level • A soundtrack that plays along with you — every hit lands in key, the music builds with your combo • Your reaction-time trend, charted: a best is a trophy, a trend is progress • Daily challenge, a seven-day login ladder and a weekly event • 24 achievements and six ranks to climb • 24 target skins and 10 arena themes • Game Center leaderboards for score, combo, perfects and fastest average reaction • iCloud sync, so your records follow you to your other devices • Challenge a friend — send your score as a link and they play the same run Built for one hand and short sessions. Every sound and every particle is generated on the device: no account to create, no extra download, and the game itself plays offline. Free to play. Optional ads let you continue a run or double your coins; an occasional ad may show after a round. Skins, coin packs and the one-time Pro upgrade (which removes ads) are optional.
Spall Field
Navigate a closing asteroid field in this first-person runner. Customize your ship, break boulders for chain reactions, and master intuitive controls. Experience immersive haptic feedback and compete for high scores.
- First-person asteroid running
- Ship customization
- Physics-based boulder destruction
- Chain reaction mechanics
- Multiple control schemes
- Haptic feedback
- Game Center leaderboards and achievements
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Spall Field is a first-person asteroid runner. Thread the gaps, break the boulders, chain the wreckage, and see how far you get before the field closes on you. Every run is different. Every run ends. CUSTOMIZE YOUR SHIP DART is fast and fragile. WEDGE is heavier and takes a hit. SAUCER turns on a coin. Pick a hull, then set its colours the way you want them. They handle differently enough to change how you fly, not just how you look. BREAK EVERYTHING Boulders come apart into shrapnel that keeps its own momentum. Catch one in a blast radius and it takes its neighbours with it — chain reactions are worth more than clean kills, if you can survive standing that close. FLY IT HOW YOU LIKE Drag to steer and tap to fire, or tilt the phone and let the ship follow your hands. Pair a controller and use the sticks. Twenty-one settings across three pages let you tune sensitivity, dead zone, motion, and the HUD until it feels right. YOU FEEL IT Distinct haptics for every impact. A pebble breaking at distance barely registers. A boulder coming apart in your face does not. GAME CENTER One leaderboard for high scores and six achievements to chase. Your scores follow you between devices. NO STRINGS No ads. No accounts. No in-app purchases. No data collection of any kind. The entire game is bundled in the app and plays with the connection off.
Screenshots
Verdict
The clearest difference is in-app purchases: Spall Field at none against Reaction Test's 7. Spall Field also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). On price 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
Both are free to download. Reaction Test sells 7 one-off in-app purchases. Spall Field asks for nothing beyond the download.
| Parameter | Reaction Test | Spall Field |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 days | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 9 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Cosmin Iulian Zimbroianu | Operator AI LLC |
In-app purchases
Reaction Test
- 600 Coins$0.99
- Void Skin$1.99
- Plasma Skin$1.99
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- Pro$2.99
- 2,000 Coins$2.99
- Starter Pack$3.99
- 6,000 Coins$3.99
Spall Field
No in-app purchases









