Stroop! vs iStroopChallenge
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Stroop!
This colorful puzzle game challenges your perception and reaction time. Match the color of the word to the word's actual color, not the word itself, under a strict time limit. Compete for high scores in this engaging brain-training experience.
- Color word matching
- Time-limited challenges
- High score competition
- Multilingual word support
- Reverse Stroop Effect gameplay
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Stroop is confusing and colorful Puzzle Game! Don't be misled by the Reverse Stroop Effect! And Touch the color correctly in limited time. Achieve a high score!! *name of color will be written in not only English, but also French and Spanish... How to Play Color name will be shown and Touch the same color speedy! If you touch wrong color or Time is up, the Game is Over... The deadline will come closer!! Choose answer in a moment and get a high score!!
iStroopChallenge
Engage in a classic psychological test transformed into an addictive mobile game. Challenge your cognitive speed by identifying ink colors, not word meanings, in a fun and effective brain training experience.
- Timed and endless game modes
- Adaptive difficulty settings
- Multiplayer challenges
- Achievements and leaderboards
- Color blind accessibility
- Multiple themes
- Detailed statistics
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STROOP CHALLENGE - Train Your Brain, Challenge Your Friends Experience the classic psychological test turned into an addictive mobile game! Test your cognitive processing speed with a simple but surprisingly difficult task: identify the INK COLOR of displayed words, not what the word says. When "RED" appears in blue ink, your brain fights its natural instinct to read. This mental conflict makes Stroop Challenge engaging and effective for brain training! Features: - Timed & Endless modes - Adaptive difficulty - Multiplayer challenges - Achievements & leaderboards - Color blind accessibility - 5 beautiful themes - Detailed statistics - Completely free!
Screenshots
Verdict
The clearest difference is review sentiment: iStroopChallenge at 100% against Stroop!'s 25%. iStroopChallenge also leads on rating (5.0 vs 3.9) and ads (none vs shown). Stroop!'s advantage is ratings volume (7 vs 1) and iOS requirement (11.0 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iStroopChallenge holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Stroop! has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 25% of Stroop!'s written reviews are positive against 100% of iStroopChallenge's.
Stroop! ships an update every 2 weeks, iStroopChallenge every 6 days. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.
| Parameter | Stroop! | iStroopChallenge |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 25.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 2 weeks | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 86 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Yukihiro Kadono | Steve Hunger |
Customer experience
Stroop!
iStroopChallenge
In-app purchases
Stroop!
No in-app purchases
iStroopChallenge
No in-app purchases
