Comparison

Stellar! vs Reaction Speed Check

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

Head to head
About

Stellar!

Defend the last planet with life from alien robots by controlling a spaceship and strategically placing towers. Loot spaceships and towers, upgrade abilities, and combine cards to build your unique defense strategy. Compete globally on the ranking system.

Highlights
  • Control spaceship to defend base
  • Select tactical upgrades
  • Loot spaceships and towers
  • Unique tower abilities
  • Combine spaceship and tower cards
  • Global ranking system
Features
Read full description

Welcome, Captain! In the current world ruled by robots, this is the only planet with life. Alien robots are constantly trying to eliminate life on this planet Protect the planet from alien robots! Features ● Protect the base from enemies by controlling the spaceship ● After each stage, you can select tactical upgrades to protect your base ● Open supply crates to loot spaceships and towers and place them tactically ● Every tower has unique abilities and skills. Use skills to defend more effectively ● Build your own strategy by combining spaceship and tower cards ● You can compete with players around the world using the ranking system owings37@gmail.com - Credit Sound: www.bensound.com

About

Reaction Speed Check

Features
Read full description

Reaction Time Test is a fun and scientific reaction time app designed to measure your reaction speed, sharpen reflexes, and enhance performance through engaging reaction time reflex games. Whether you’re a gamer, athlete, or simply curious about your reflex performance, this powerful brain test tool helps you discover your true potential and improve with structured reflex training and smart brain training challenges. Test your limits with fast and accurate reaction time measurements in milliseconds. Improve your reaction speed through interactive reaction time reflex games designed to strengthen focus, coordination, and reflex accuracy. Each session works as a focused brain training exercise, helping you react faster and think sharper. Key Features: • Measure reaction time with precise millisecond accuracy • Engaging reaction time reflex games for effective reflex training • Improve reaction speed for gaming, sports, and daily activities • Advanced brain training exercises to boost focus and coordination • Detailed performance insights and progress tracking • Fun and challenging brain test modes This all-in-one reaction time and brain training app is perfect for competitive gamers, athletes, students, or anyone looking to improve reaction speed and reflex control. Train daily with scientifically designed reflex training drills and dynamic reaction time reflex games that push your limits. Strengthen your focus, sharpen your reflexes, and improve your performance with consistent brain training and accurate brain test results. Track your improvement, beat your personal best, and become faster every day. Download Reaction Time Test now and start your journey toward better reaction time, faster reaction speed, smarter brain training, and advanced reflex training today.

Screenshots

Stellar!4 screens
Reaction Speed Check4 screens

Verdict

The call

The clearest difference is in-app purchases: Reaction Speed Check at none against Stellar!'s 6. Reaction Speed Check also leads on ads (none vs shown). Stellar!'s advantage is update cadence (every 2 months vs every 6 months) and iOS requirement (13.0 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Stellar! sells 6 one-off in-app purchases. Reaction Speed Check asks for nothing beyond the download.

UpkeepUpdate frequency

Stellar! ships an update every 2 months, Reaction Speed Check every 6 months. Both last shipped on November 6, 2026.

Scorecard4 real differences · 6 level
Stellar! versus Reaction Speed Check: the parameters behind the verdict, then further details
ParameterStellar!Reaction Speed Check
PriceFreeFree
Rating2.2 (5 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 months — betterEvery 6 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size104 MB65 MB
Age rating9+9+
DeveloperSeHyeon Imxita apps

In-app purchases

6 purchases

Stellar!

One-time6
  • 20 GEMS$0.99
  • 110 GEMS$4.99
  • 240 GEMS$9.99
Show 3 more
  • 550 GEMS$19.99
  • 1500 GEMS$49.99
  • 3200 GEMS$99.99
None

Reaction Speed Check

No in-app purchases

Questions

Is Stellar! free?
Stellar! is free to download, with in-app purchases available.
Is Reaction Speed Check free?
Reaction Speed Check is free to download, with no in-app purchases.
Do Stellar! or Reaction Speed Check have ads?
Stellar! shows ads; Reaction Speed Check does not.
Which is updated more often, Stellar! or Reaction Speed Check?
Stellar! ships an update every 2 months, and Reaction Speed Check every 6 months. Most recently, Stellar! was updated on November 6, 2026 and Reaction Speed Check on November 6, 2026.

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