20s Timer vs Modern Chess Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
20s Timer
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Use the 20s Timer & Reminders for those essential activities. + 20 second timer + Set notifications to remind you + Pick from a set of sounds to make it clear that the 20s Timer app notified you + Use for power workouts + Timing essential duties Remove the Ads with In-App purchase
Modern Chess Clock
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The chess clock is a timer with world-renowned methods used by amateur or professional chess players to make the game of chess even more quality and exciting. This is not a game of chess, but a clock next to the players. - Play with the most popular play times or add your own play methods. - Suitable for everyone with annotated playtime methods. - Add excitement to your game with sound alerts. - Get the ad-free game timer experience.
Screenshots
Verdict
The clearest difference is in-app purchases: Modern Chess Clock at none against 20s Timer's 1. Modern Chess Clock also leads on ads (none vs shown) and update cadence (every 10 days vs every 37 months). 20s Timer's advantage is iOS requirement (13.0 vs 15.0). 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. 20s Timer sells 1 one-off in-app purchase. Modern Chess Clock asks for nothing beyond the download.
20s Timer ships an update every 37 months, Modern Chess Clock every 10 days. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.
| Parameter | 20s Timer | Modern Chess Clock |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 37 months | Every 10 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | MARK MANSER | Nurullah Bilgin |
In-app purchases
20s Timer
- Remove Ads$2.99
Modern Chess Clock
No in-app purchases
Questions
Is 20s Timer free?
Is Modern Chess Clock free?
Do 20s Timer or Modern Chess Clock have ads?
Which is updated more often, 20s Timer or Modern Chess Clock?
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