Comparison

PI Stone vs OJ Memory

Price, ratings, monetisation and update history for both games, side by side โ€” with what reviewers say about each.

Head to head
About

PI Stone

Read full description

PI STONE โ€“ THE RELAXING BLOCK PUZZLE FOR ANY MOMENT Dive into the fascinating world of PI Stone, a classic block puzzle with a modern twist! Drag colorful block shapes of different sizes onto a game board, complete full rows and columns to clear them, and collect as many points as possible. The smarter you plan, the longer you survive โ€“ and the higher your high score climbs. EASY TO LEARN, HARD TO MASTER PI Stone needs no explanation: drag the displayed block shapes onto the grid with your finger. If they fit, they stay put. Complete a full row or column, and it's automatically cleared, earning you points. But watch out: if there's no more room for the next shapes, the round is over. Clever forward planning is the key to success. COMBO SYSTEM FOR TRUE PUZZLE PROS Clear multiple rows in a row to charge up your combo bar. Once it's full, you can trigger a powerful bonus to save yourself from a tricky situation or send your score soaring. SPECTACULAR SPECIAL STONES Alongside the classic block shapes, special stones occasionally appear that create spectacular chain reactions: Bomb โ€“ blasts free the surrounding blocks Lightning โ€“ clears an entire row or column in one strike Mega Block โ€“ clears the whole board in a single blow CUSTOMIZABLE LIKE NEVER BEFORE Unlock new block styles, block shapes, and background themes as you play, and design your game board to match your taste. Plus, matching relaxing music tracks and atmospheric sound effects that you can switch up in-game. FOR EVERY SPARE MINUTE PI Stone runs completely offline โ€“ no internet access, no account, no sign-up required. Whether it's a quick break on the train or a relaxing game night on the couch: open the app and start playing right away. HIGH SCORE CHALLENGE Every round counts: your best score is saved so you can challenge yourself and your friends anytime. HIGHLIGHTS - Addictive block puzzle โ€“ Place 39 different stone shapes on an 8ร—8 board and clear rows and columns. Easy to learn, hard to master! - Combo system with extra rewards โ€“ Fill your combo bar with clever moves and swap your tray for fresh stones โ€“ for even higher scores. - Explosive special stones โ€“ Bomb, Lightning, and the legendary Mega Block create spectacular chain reactions and clear the entire board in an instant. - 99 levels full of rewards โ€“ Collect XP, level up, and unlock over 55 customization options: 10 block styles, 6 block shapes, and 39 gorgeous backgrounds โ€“ freely combinable to suit your taste. - 20 captivating music tracks โ€“ Unlockable songs make sure boredom never sets in. - Breathtaking effects โ€“ Glowing line previews, sparkling particle dust, explosions, and level-up banners turn every round into a visual experience. - Compete with the world โ€“ Apple Games integration with a global leaderboard โ€“ who will claim the high score throne? - Fine-tuned haptic feedback โ€“ Every move feels alive. Download PI Stone now!

About

OJ Memory

Features
Read full description

OJ Memory is a simple and colorful memory game for kids ages 3โ€“9. It is designed to be easy to understand, quick to start, and fun to play again and again. Kids can choose from Vehicles, Space, Sports, Animals, Food, and Plush Toys, select the number of cards, turn over two cards at a time, and try to find matching pictures. The game features clear images, calm transitions, and a leaderboard for every level so the family can follow progress. Six categories with 15 clear pictures in each Multiple difficulty levels with different numbers of cards A leaderboard for every level Medals for 1stโ€“3rd place A record celebration when the player beats the best time Optimized for iPhone, iPad No ads No sign-in No in-app purchases No data stored outside the device OJ Memory is especially well suited to younger children who want to practice memory, recognition, and concentration in a safe and uncluttered game.

Screenshots

PI Stone4 screens
OJ Memory4 screens

Verdict

The call

The clearest difference is ads: OJ Memory at none against PI Stone's shown. PI Stone's advantage is iOS requirement (18.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PI Stone ships an update every 3 days, OJ Memory every 2 days. The most recent releases landed on October 9, 2026 and October 19, 2026 respectively.

Scorecard2 real differences ยท 4 level
PI Stone versus OJ Memory: the parameters behind the verdict, then further details
ParameterPI StoneOJ Memory
PriceFreeFree
Update frequencyEvery 3 daysEvery 2 days โ€” better
AdsYesNo โ€” better
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.0 โ€” better26.0
Further details โ€” not scored
Size122 MB112 MB
Age rating4+4+
DeveloperPeter IwanowitschJonas Hedberg

In-app purchases

None

PI Stone

No in-app purchases

None

OJ Memory

No in-app purchases

Questions

Is PI Stone free?
PI Stone is free to download, with no in-app purchases.
Is OJ Memory free?
OJ Memory is free to download, with no in-app purchases.
Do PI Stone or OJ Memory have ads?
PI Stone shows ads; OJ Memory does not.
Which is updated more often, PI Stone or OJ Memory?
PI Stone ships an update every 3 days, and OJ Memory every 2 days. Most recently, PI Stone was updated on October 9, 2026 and OJ Memory on October 19, 2026.

Other comparisons