Petri vs Joy Square
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Petri
Engage in a relaxing puzzle game by matching colorful alien blobs to clear the screen. Explore three distinct game modes, including timed challenges and an endless mode for a casual experience. Playable on various Apple devices, including Apple Watch.
- Match alien blobs by color
- Blast black blobs
- Arcade mode (timed)
- Daily puzzle challenge
- Endless mode (no time limit)
- Apple Watch support
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A unique, relaxing puzzle experience awaits! Put on your lab coat and enter Petri Labs as an extraterrestrial life researcher. Match alien blobs by color and blast away the black blobs at the center of the dish. Try all 3 game modes that offer different gameplay experiences. Ways to play: • Arcade mode - Hurry and get to the center before the timer runs out! • Daily puzzle mode - Can you get in the Top 5 in the daily challenge? • Endless mode - Chill out and make matches with no time limit. • Play on your wrist! (Apple Watch 4 and higher) What people are saying: "A totally new take on bubble shooters and match-3 mechanics!" "It feels so alive... and so cute." "Awesome game. I've already played it for 2 hours." So what are you waiting for? Try Petri: Blobs from Space! today!
Joy Square
A puzzle game designed to enhance your attention span by challenging you to locate and track a solid square against the clock. Compete globally for high scores and enjoy a fun, engaging experience. A premium version offers additional content and features.
- Attention improvement
- Locate and track solid squares
- Timed gameplay for maximum points
- Global leaderboard competition
- Playable on iPhone, iPad, and Apple Watch
- Complete level packs (Premium)
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This puzzle game will help you to increase you attention. Locate the solid square and track it on the game field while timer is running to get maximum points. Become the leader in global competition and simply have fun! Please, support us by purchasing the Premium Version. For small amount of money you get * Complete level pack * Attention improvement * Leaderboard access Play on iPhone, iPad or Apple Watch.
Screenshots
Verdict
The clearest difference is ads: Joy Square at none against Petri's shown. Petri's advantage is update cadence (weekly vs every 2 months) and ratings volume (34 vs 7). On price, rating, review sentiment and in-app purchases 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. Petri sells 1 one-off in-app purchase and Joy Square sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Petri against 4.9 for Joy Square. Both are backed by a comparable volume of ratings — 34 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Petri ships an update weekly, Joy Square every 2 months. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.
| Parameter | Petri | Joy Square |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (34 ratings) — better | 4.9 (7 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 34 — better | 7 |
| Update frequency | Weekly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Requires iOS | 12.0 — better | 14.4 |
| Further details — not scored | ||
| Size | 65 MB | 15 MB |
| Age rating | 9+ | 4+ |
| Developer | Beep Yeah! | Alexander Fedoseev |
Customer experience
Petri
Joy Square
In-app purchases
Petri
- Remove Ads$2.99
Joy Square
- Premium Access$0.99
Questions
Is Petri free?
Is Joy Square free?
Which has better reviews, Petri or Joy Square?
Do Petri or Joy Square have ads?
Which is updated more often, Petri or Joy Square?
Other comparisons
