ERS vs Koikoi
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
ERS
A highly customizable and entertaining digital card game based on Egyptian Rat Slap. Play against friends or AI with numerous rule and art combinations for a unique experience.
- Customizable rules
- Personalizable artwork
- Play against AI
- Multiplayer on one device
- Multiple card play methods
- 13 favorite rules
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Imagine a card game that is super inviting, personalizable and entertaining. This is that game. ERS is an extremely colorful, customizable, and fun way to play Egyptian Rat Slap (or Rat Screw). On the same iPhone or iPod Touch, you can play with a friend or challenge a computer at five levels of difficulty. You can play cards by either swiping them toward the pile, or by double or single taping on the card. The game sports 13 of your favorite rules. With nearly 170 combinations of them, you can definitely play with the style you are accustomed to. Nine artistically designed cards and nearly 20 backgrounds combine to create nearly 200 unique looks. You can make the game look truly yours. With over 35,000 different combinations of rules, playing styles, and artwork, the possibilities for fun are limitless with ERS.
Koikoi
Experience the traditional Japanese card game of Hanafuda. Match cards to collect sets and score points over a series of rounds. The player with the highest total score after 12 games wins.
- Hanafuda card game
- Match cards to collect sets
- Score points
- 12-game rounds
- Automatic game record saving
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Koikoi is a game of Hanafuda (Japanese Playing Cards). -How to play Koikoi Throw away the card to the table into play alternately. If there is a match of the month, you can get the cards. You will be able to finish the game to get a point if your cards are flush. You are also possible to continue the game. Can not score with each other and no game. The winner is who get more points total 12 times game. Game record will be saved automatically.
Screenshots
Verdict
The clearest difference is price: ERS at Free against Koikoi's $1.99. ERS also leads on review sentiment (45% vs 20%) and iOS requirement (8.0 vs 17.6). Koikoi's advantage is rating (3.4 vs 1.7) and chart position (#90 vs unranked). On ratings volume, update cadence, ads 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
ERS is free to download; Koikoi costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Koikoi holds the better App Store score, 3.4 against 1.7. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews complicate that: 45% of ERS's written reviews are positive against 20% of Koikoi's, so the app with the better star average is not the one people write more warmly about.
ERS ships an update every 8 months, Koikoi every 6 months. Both last shipped on November 1, 2026.
| Parameter | ERS | Koikoi |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 1.7 (11 ratings) | 3.4 (5 ratings) — better |
| Positive reviews | 45.5% of reviews — better | 20.0% of reviews |
| Number of ratings | 11 — better | 5 |
| Update frequency | Every 8 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #90 — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 11 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | KKIT Creations | Kouichi Hayashi |
Customer experience
ERS
Koikoi
In-app purchases
ERS
No in-app purchases
Koikoi
No in-app purchases
