MemTrainer vs SHI
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
MemTrainer
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This game trains your memory by having you recall tiles that have just been displayed. In each round, different tiles will be shown, then flipped face down. You will then need to specify the tiles you saw, using the keypad. You have to do that within a time limit. The keypad will slide away once the time expires. Points will be awarded as follows: - A point will be awarded for each tile matched - Double points will be awarded if you match all tiles in a set - Sometimes tiles will be rotating and upside down when presented, double points will be awarded for each of those that are matched Another round will begin and the cycle repeats until the game period of two minutes is over. You will advance to the next level if you achieve two rounds of exact matches. At every new level: - One additional tile will be displayed - More time will be allowed for keying in the tiles on the keypad - The game period is extended by two additional minutes every time you advance to a new level When the game is over, you will be prompted to select one of the following: - play again - submit score to leader board - show the leader board - quit You may also see the leader board at any time by clicking on the score.
SHI
Engage with stories from early Japan by solving intricate puzzles on a beautifully designed lacquer box. Journey through ancient tales, uncover hidden meanings, and experience the art of Japanese lacquerware.
- Challenging lacquer box puzzles
- Engaging ancient Japanese stories
- Beautiful Japanese lacquerware design
- Japanese language learning elements
- Taiko drum soundscapes
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Solve challenging puzzles on a beautiful Japanese lacquer box and engage with stories based in early Japan: In the beginning, so the Kojiki tells, sea was sky and sky was sea. Journey towards calmness while rotating a lacquer box, puzzle by puzzle, word by word, further in time. In SHI•RO you reconcile past and present with empress Gemmei, travel through dark forests to invite spirits to the shrine of old Yoshida, and climb Mount Inari with a fox. PLAY AN ENGAGING STORY SHI•RO tells the story of an ancient empress, a lost love and a blossoming friendship. Based on the first Japanese writing, the Kojiki, you engage with an emerging world. SOLVE CHALLENGING PUZZLES Over 60 handmade puzzles challenge you along the journey of empress Gemmei. Think out of the box while playing on a lacquer box! Will you help the empress to separate the sea from the sky? ENJOY A BEAUTIFUL DESIGN SHI•RO celebrates the beauty of Japanese lacquerware by transforming your device into a lacquer box. Gold and silver shimmer in your hands while you unriddle complex geometries and find stories of depth beyond the surface. LISTEN TO THE SOUND OF JAPAN By solving puzzles, you hear words of Japanese language, or as a native speaker of Japanese, learn words in English. Japanese Taiko drums will guide your way. ENTER THE SHI•RO UNIVERSE By purchasing SHI•RO, you get access to the complete first part, KURO. But more is in the making! Once we release the second part MIDORI and the third part AKA, you will be able to purchase them in-game and continue your journey.
Screenshots
Verdict
The clearest difference is price: MemTrainer at Free against SHI's $2.99. SHI's advantage is ads (none vs shown) and update cadence (every 2 months vs every 57 months). On in-app purchases, device support and iOS requirement 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
MemTrainer is free to download; SHI costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MemTrainer ships an update every 57 months, SHI every 2 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.
| Parameter | MemTrainer | SHI |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | — | 4.6 (215 ratings) — better |
| Positive reviews | — | 68.3% of reviews |
| Number of ratings | — | 215 — better |
| Update frequency | Every 57 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 181 MB |
| Age rating | 4+ | 9+ |
| Developer | POK | the brothers grimm |
Bugs and requests
MemTrainer
Not enough reviews yet to summarise bugs or requests.
SHI
Reported bugs
5 issues- Cannot find a way to reset the game
- Error with game purchase
- Parts don't seem to work
- Game enforces arbitrary move order
- Confusing UI, need clearer restart/reset options
Requested features
6 requests- More levels/stories
- Ability to reset the game
- Landscape view option for iPad
- Daily puzzles
- More instructions/tutorial
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- Option to go back one move
In-app purchases
MemTrainer
No in-app purchases
SHI
No in-app purchases









