# Blackjack 21 offline games

> Taken from the public Google Play listing. Every figure below carries the date it was updated.
> Nothing is modelled or estimated. A new collection starts at 00:00 UTC daily and takes several hours; an individual app's reading lands at some point inside that window.

Source page: https://appcurves.com/app/blackjack-21-offline-games

- Package: `com.zj.blackjack.cards21.casino`
- Developer: Beijing ZJCYOU Technology Co., Ltd
- Category: Casino
- Platform: Android (Google Play)
- Released: Aug 5, 2020
- Lifetime downloads: 280,839 (updated 2026-08-16)
- What the store shows instead: 100,000+
- Rating: 4.12 from 1,297 ratings
- Downloads added: 157 on 2026-08-16
- Readings kept: 5 (2026-08-06 → 2026-08-16)

### Latest readings

| Date (UTC) | Lifetime downloads | Added |
|---|---:|---:|
| 2026-08-06 | 279,950 | — |
| 2026-08-07 | 280,018 | +68 |
| 2026-08-08 | 280,018 | held |
| 2026-08-15 | 280,682 | +664 over 7 days |
| 2026-08-16 | 280,839 | +157 |

"held" means Google's own counter showed the same figure as the day before — it is a real reading, not a missed one. A multi-day "Added" spans two real readings; the days between were not read.

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Site last completed a reading on 2026-09-22. AppCurves is not real-time.
When citing, include the reading date. https://appcurves.com/faq answers where the figure comes from.