Dozen vs Janken
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Dozen
A challenging memory card game where you compete against your iPhone to test and improve your memorization skills. Flip cards, match pairs, and score points before the device outmaneuvers you. Engage in fast-paced, addictive gameplay anytime, anywhere.
- Memory card game
- Compete against iPhone
- Memorize card locations
- Score pairing points
- Fast-paced gameplay
- Sharpen memory
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Dozen is a new kind of memory card game, one in which you play against the iPhone© to prove your memorizing abilities. Flip cards, memorize their locations, and score pairing points before the iPhone© beats you to it. Challenge your mind, sharpen your memory, and engage in fast-paced gameplay that is addictive, right from your pocket. Take Dozen with you wherever you go, pairing off cards as you race against your iPhone©. It’s a great way to travel, unwind after a long day, or simply take a break from the work or studying at hand.
Janken
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Let's do brain training with a dog! Hit the object that falls from above. Rock, Paper, Scissors, Go!
Screenshots
Verdict
The clearest difference is ads: Dozen at none against Janken's shown. Janken's advantage is iOS requirement (11.0 vs 15.0). On price, update cadence, 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.
Dozen ships an update every 5 months, Janken every 6 months. Both last shipped on November 3, 2026.
| Parameter | Dozen | Janken |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (21 ratings) — better | — |
| Positive reviews | 96.6% of reviews | — |
| Number of ratings | 21 — better | — |
| Update frequency | Every 5 months — better | Every 6 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 165 MB |
| Age rating | 17+ | 4+ |
| Developer | Igor Fedorov | Takumi Seki |
In-app purchases
Dozen
No in-app purchases
Janken
No in-app purchases
