ISSEN vs Yutkun
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
ISSEN
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ISSEN is a calm-then-explosive samurai timing game. Breathe, focus, and release a single perfect stroke. In the stillness of a sumi-e ink world, one flash of the blade decides everything. THE WAY OF ONE CUT Wait for the moment. Swipe one arc to slash every target in range. A dead-center cut becomes a True Issen - time slows, ink bursts across the screen, and your combo soars. One stroke can cut several at once. A SUMI-E INK WORLD Hand-painted Japanese ink-wash visuals: black sumi ink, a single stroke of vermilion, and the beauty of empty space. Stillness and motion in sharp contrast - quiet calm, broken only by the flash of your blade. BREATH AND FOCUS Land True Issen cuts and keep your combo to fill the Breath gauge. Release it to enter focus: the world slows, the cut window widens, and you chain huge combos in the decisive moment. READ THE FLAMES - Red: cut it - a dead-center hit is a True Issen - Blue: timing targets to read and slash - Gold: cuts only on a perfect center hit - a big bonus that restores a life MORE TO MASTER - Boss duels: one-on-one showdowns - Daily Cut: a fixed daily challenge, the same for everyone - Dojo: unlock 6 blade-trail skins - Records and encyclopedia: chase your personal bests - Stage select: replay any cleared stage FEATURES - Pure one-stroke control - easy to learn, deep to master - Satisfying slow-motion on every perfect cut - Original Japanese instrumental soundtrack (shakuhachi and koto) - 12 languages supported - One-handed, portrait play - No internet required after install Free to play, supported by ads. Breathe. Focus. The world slows. Then - one flash.
Yutkun
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Start as a tiny whale with a big appetite. Eat smaller creatures, dodge the dangerous ones, and grow through five evolution stages until you rule the deep โ then dive even deeper. โข Eat or be eaten โ size matters: hunt what's smaller, escape what's bigger โข Grow through 5 evolution stages, then push into the endless Depth for rising score bonuses โข Chain catches into combos and ignite FEVER mode โข Daily missions, achievements and a creature log with species mastery โข Spend pearls on permanent upgrades: wider mouth, extra lives, faster tickets and more โข Style your whale with skins and glowing trails โข Race real rivals on the global leaderboard โ they can pass you while you're away! โข Daily rewards and streaks; pause any run and resume it later Quick to pick up, hard to put down. Free to play.
Screenshots
Verdict
The clearest difference is in-app purchases: ISSEN at none against Yutkun's 7. Yutkun's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, ads 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
Both are free to download. Yutkun sells 7 one-off in-app purchases. ISSEN asks for nothing beyond the download.
ISSEN ships an update every 4 days, Yutkun every 2 days. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.
| Parameter | ISSEN | Yutkun |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | Every 2 days โ better |
| Ads | Yes | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 16.0 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 166 MB | 78 MB |
| Age rating | 12+ | 4+ |
| Developer | Kenji Kobayashi | BURAK SIMSEK |
In-app purchases
ISSEN
No in-app purchases
Yutkun
- 1200 Pearls$0.99
- 500 Pearls$0.99
- Starter Pack$0.99
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- Permanent 2x Pearls$0.99
- No Ads$1.99
- 2800 Pearls$1.99
- 6500 Pearls$3.99








