Word Gaps vs 21
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Word Gaps
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Hello friends, Another simple and small word game. This time you must complete the words that are missing some letters. One thing you need to remember that words share the same missing letters; so the problem seem to be more simple. It's really fun ! Play and feel free to give your feedback here!
21
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Hit 21. Don't bust. Claim falling cards, stack smart, and clear every slot. Easy to learn, impossible to master.
Screenshots
Verdict
The clearest difference is ads: Word Gaps at none against 21's shown. Word Gaps also leads on iOS requirement (13.0 vs 15.1). 21's advantage is update cadence (every 2 days vs every 15 months). 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.
Word Gaps ships an update every 15 months, 21 every 2 days. The most recent releases landed on August 23, 2026 and September 19, 2026 respectively.
| Parameter | Word Gaps | 21 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 15 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 96 MB | 39 MB |
| Age rating | 12+ | 4+ |
| Developer | Hieu Hoang | Chee Hoong Khor |
In-app purchases
Word Gaps
No in-app purchases
21
No in-app purchases
