# 21: Drinking Game — Who has the best memory?

> Who has the best memory? (iPhone/iPad app by William Gjeruldsen.)

- Source: https://appshunter.io/ios/app/21-drinking-game/id1367127555 (this page in markdown: same URL + `.md`)
- Developer: [William Gjeruldsen](https://appshunter.io/developer/1064174644)
- Category: Entertainment, Games, Card, Word
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 11.0 · 13 MB
- Languages: American English, Danish, German (Germany), Norwegian Bokmål, European Spanish, Swedish
- Released: 2018-04-09
- Data updated: 2026-08-15
- User reviews in markdown: https://appshunter.io/ios/app/21-drinking-game/id1367127555/reviews.md

## What is 21?

21 will prove if everyone in the group has a good memory.

1. The player with the device will start by saying «1»​ unless number 1 has a rule.

2. The player to their left then continues to say «2» and so on in the circle of players.

3. At the start of the game, the players will add three rules to three numbers. The rules are meant to be things to say or do instead of saying the number. So let’s say we add «say horse» to the number «7». Each time a player is meant to say 7 they will have to say «horse» instead.

4. Each time a player forgets about a rule, the player with the device presses the «wrong» button to reset the count and everyone takes a sip.

5. The player that forgot about the rule will then be handed the device and start the next round.

6. The player with the device will press «next» each time someone says a number or rule during the count to control that all rules are being remembered.

7. Each time the players count all the way through 21 they will add another rule.

8. The group wins by going through a full round of rules.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 21 Pro | $0.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2018-04-09

This app has been updated by Apple to display the Apple Watch app icon.

## Apps similar to 21

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [The Drinking Game: Party Time!](https://appshunter.io/ios/app/the-drinking-game-party-time/id1129958413) | 4.7 (390) | Free | Entertainment |
| [Pin-up: Dirty House Party Game](https://appshunter.io/ios/app/pin-up-dirty-house-party-game/id1471615863) | 4.7 (194) | Free | Entertainment |
| [Spill - Group Party Games](https://appshunter.io/ios/app/spill-group-party-games/id1234482088) | 4.6 (1,011) | Free | Entertainment |
| [Couples Games for Date Night](https://appshunter.io/ios/app/couples-games-for-date-night/id1582814195) | 4.5 (464) | Free | Entertainment |
| [Party Games: Roulette Wheel 2](https://appshunter.io/ios/app/party-games-roulette-wheel-2/id1498648360) | 4.6 (96) | Free | Entertainment |
| [Prost! Party Games](https://appshunter.io/ios/app/prost-party-games/id1562907871) | 4.7 (830) | Free | Entertainment |

## More apps by William Gjeruldsen

- [Drinking Game - Drinking Mate](https://appshunter.io/ios/app/drinking-game-drinking-mate/id1196741991)
- [Games Quiz - Guess the Game](https://appshunter.io/ios/app/games-quiz-guess-the-game/id1214364333)
- [Flappy Blow](https://appshunter.io/ios/app/flappy-blow/id1214737564)
- [PartyPal: Party Game](https://appshunter.io/ios/app/partypal-party-game/id1284471058)
- [Ring of Fire: Drinking Game](https://appshunter.io/ios/app/ring-of-fire-drinking-game/id1367122529)
- [Never Have I Ever: Drink Game](https://appshunter.io/ios/app/never-have-i-ever-drink-game/id1367123788)

All apps by William Gjeruldsen: https://appshunter.io/developer/1064174644

## Related topics

[rule 21 game](https://appshunter.io/ios/topics/rule-21-game) · [mixed drink game](https://appshunter.io/ios/topics/mixed-drink-game) · [tropical drink game](https://appshunter.io/ios/topics/tropical-drink-game) · [drinking card game for adults](https://appshunter.io/ios/topics/drinking-card-game-for-adults)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*