Comparison

SL!NG vs Reaction Test

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

Head to head
About

SL!NG

Features
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Pull back, aim, and release. SL!NG turns a single touch into a fast, tactile momentum challenge. Every launch is about timing: read the field, choose your angle, and keep the run alive. PLAY YOUR WAY • Classic — chase distance and a new personal best • Combo — link clean moves and protect your multiplier • Time Attack — score as much as possible before time runs out • Daily Challenge — one shared challenge every day • Rush — react quickly as the pace climbs • Ghost Race — compete against a rival run MAKE IT YOURS Earn coins, complete achievements, and unlock a growing collection of balls, trails, and maps. Each style changes the look while the precise one-touch controls stay familiar. CLIMB THE RANKS Compare scores on global, country, and daily leaderboards. Optional cloud save keeps your progress connected. No account is required for core gameplay. Easy to start. Difficult to master. How far can you SL!NG?

About

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.

Screenshots

SL!NG4 screens
Reaction Test4 screens

Verdict

The call

The clearest difference is in-app purchases: SL!NG at none against Reaction Test's 7. Reaction Test's advantage is update cadence (every 2 days vs every 11 days). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Reaction Test sells 7 one-off in-app purchases. SL!NG asks for nothing beyond the download.

UpkeepUpdate frequency

SL!NG ships an update every 11 days, Reaction Test every 2 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard2 real differences Ā· 4 level
SL!NG versus Reaction Test: the parameters behind the verdict, then further details
ParameterSL!NGReaction Test
PriceFreeFree
Update frequencyEvery 11 daysEvery 2 days — better
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size13 MB9 MB
Age rating12+4+
DeveloperArmin MirandaCosmin Iulian Zimbroianu

In-app purchases

None

SL!NG

No in-app purchases

7 purchases

Reaction Test

One-time7
  • 600 Coins$0.99
  • Void Skin$1.99
  • Plasma Skin$1.99
Show 4 more
  • Pro$2.99
  • 2,000 Coins$2.99
  • Starter Pack$3.99
  • 6,000 Coins$3.99

Questions

Is SL!NG free?
SL!NG is free to download, with no in-app purchases.
Is Reaction Test free?
Reaction Test is free to download, with in-app purchases available.
Do SL!NG or Reaction Test have ads?
Both SL!NG and Reaction Test show ads.
Which is updated more often, SL!NG or Reaction Test?
SL!NG ships an update every 11 days, and Reaction Test every 2 days. Most recently, SL!NG was updated on October 31, 2026 and Reaction Test on October 25, 2026.

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