Dynamic Visual Acuity vs Sub250
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Dynamic Visual Acuity
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Numbers pass in front of your eyes at high speed, and you must enter the number and answer with a check mark. Each time you answer correctly, the number of digits passing by increases. There are two modes: High Speed and Low Speed. Aim for a high ranking in the national ranking!
Sub250
Measure your reflexes with precision using multiple modes. This app calibrates your device's latency for accurate results and focuses on median scores over luck. It's designed for competitive gamers who need to understand their true reaction speed.
- Multiple reaction-time modes
- Device latency calibration
- Median score calculation
- Anti-anticipation features
- No accounts or servers
- Local-only data storage
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Five reaction-time modes with native iOS timing. Your device's latency floor shows next to every score in ms. What's reflex, what's hardware. Free. Sub250 measures your reflexes the way they should be measured. The headline number is the median of your last ten attempts, not your luckiest tap, with millisecond-level precision and your device's calibrated latency floor shown alongside every score. FIVE REACTION-TIME MODES • Simple RT: wait for green, tap as fast as you can. • F1 Lights Out: five red lights, then go, exactly like the grid. • Go / No-Go: tap green, hold red. The clock catches you if you flinch. • Choice RT: four zones, react to whichever lights up. • Target Hunt: tap pop-up targets in random spots before they fade. Thirty seconds. WHY SUB250 IS DIFFERENT Latency-honest. Every device adds touch-to-display latency. Sub250 calibrates yours in about three seconds at startup and shows the floor in milliseconds next to every score. We think every reaction-test app should. Median-of-10. The score reflects skill, not variance. Best-of-N is available as a secondary number, never the headline. Anti-anticipation. Randomized stimulus intervals on every interval-based mode. Jumpstarts cost a re-arm. The clock is honest. 100% free. No accounts. No servers. No subscriptions. No ads. No in-app purchases. Ever. Local-only. Your sessions never leave your device. There is no leaderboard to game, no profile to fill out, no email to give up. BUILT FOR COMPETITIVE GAMERS If you play Counter-Strike, Valorant, Apex, racing sims, or anything else where the difference between 200 and 230 ms matters, Sub250 was built for you. The score is the score. Open Sub250, run the calibration, and see what your real reflex looks like.
Screenshots
Verdict
The clearest difference is ads: Sub250 at none against Dynamic Visual Acuity's shown. Sub250 also leads on update cadence (weekly vs every 39 months). Dynamic Visual Acuity's advantage is iOS requirement (14.1 vs 16.4). 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.
Dynamic Visual Acuity ships an update every 39 months, Sub250 weekly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.
| Parameter | Dynamic Visual Acuity | Sub250 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 39 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 14.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 6 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Saki Inoue | Pierre Caporossi |
In-app purchases
Dynamic Visual Acuity
No in-app purchases
Sub250
No in-app purchases
Questions
Is Dynamic Visual Acuity free?
Is Sub250 free?
Do Dynamic Visual Acuity or Sub250 have ads?
Which is updated more often, Dynamic Visual Acuity or Sub250?
Other comparisons
