Comparison

ArcEmu vs KAII

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

Head to head
About

ArcEmu

Experience retro gaming on your Apple Watch, iPhone, and iPad. This emulator supports Game Boy, Game Boy Color, and Game Boy Advance cartridges. Enjoy features like multiplayer, cheats, and customizable controls.

Highlights
  • Game Boy, GBC, GBA emulation
  • Multiplayer support
  • Cheat codes
  • Customizable on-screen controls
  • Save State sharing
  • iCloud support
Features
Read full description

ArcEmu brings retro game emulation to Apple Watch. It also works on iPhone, iPad, and Apple TV, delivering a seamless gaming experience across your Apple devices. Supported Consoles - Game Boy (.gb) - Game Boy Color (.gbc) - Game Boy Advance (.gba) - Pokémon Mini (.min) - Nintendo Entertainment System (.nes) - Super Nintendo Entertainment System (.sfc and .smc) - Atari 2600 (.a26 and .bin) Main Features - Accurate, high-performance emulation powered by the mGBA and Ares cores - Game Link Cable support with online multiplayer for up to four players* - Cheat-code support with a built-in database of popular codes** - Frame-independent emulation at 30 or 60 FPS - Multi-touch and Digital Crown support on Apple Watch - Support for all screen orientations on iPhone and iPad - Precise, thoughtfully designed on-screen controls - Customizable control position and transparency on iPhone and iPad - Fast-forward at 2×, 4×, or maximum speed - Slow motion at 0.5× speed - Touch-based light gun controls for NES and SNES - Custom color palettes for Game Boy games - Button hold/sustain feature - Accelerometer support - Gyroscope support on iPhone and iPad, with Digital Crown input on Apple Watch - Haptic feedback on iPhone - Game controller support with customizable button mappings - ZIP archive support - Automatic saving - Save-state sharing between devices - iCloud support for ROMs and save states - ROM sharing through iCloud using share codes - Support for Apple Watch devices configured with Family Setup - ROM sorting and search Apple Watch Compatibility - Apple Watch Series 4 or later - Apple Watch SE or later - Apple Watch Ultra or later ArcEmu does not include any games or ROMs. You can import compatible ROM files from your iPhone and store them in iCloud. Your Apple Watch can then download them directly from iCloud. On an Apple Watch configured with Family Setup, ROMs can be downloaded from iCloud using share codes. Games Featured in the Screenshots - Acorn Grove: https://gibbongl.itch.io/acorn-grove - Anguna: https://gauauu.itch.io/anguna - Hauntsfield: https://alliemackie.itch.io/hauntsfield - µCity Advance: https://skylyrac.itch.io/ucity-advance * Requires a Game Center account. ** Cheat codes may cause unexpected behavior or affect game stability and save data. ArcEmu is not affiliated with, endorsed by, or sponsored by Nintendo. Nintendo and the names of its game systems are trademarks of Nintendo Co., Ltd.

About

KAII

Features
Read full description

【KAII-ROKU — You are the last Sealer】 The creatures that should have vanished are stirring once more. Yokai, cryptids (UMA), and the urban legends whispered in the dark— hunt down 150 mysterious beings and seal them with your own hands. ■ Timing-Based Sealing Battles Tap the instant the shrinking spirit circle closes in. Nail a PERFECT for 1.5x power. Easy to learn, tense to master. ■ Explore 5 Haunted Spots Shrine → School → Abandoned Village → Sea of Trees → Lake. The deeper you go, the more fearsome the creatures. New areas unlock as you progress. ■ Forge Talismans & Amulets Upgrade your attack "Fuda" talismans and defense "Omamori" amulets across 6 tiers. Collect spirit coins, grow stronger, and take on tougher yokai. ■ Complete the Codex Every sealed creature is recorded in your bestiary. Collect all 150 yokai, cryptids, and urban legends—check their rarity, stats, and category. ■ Perfect for players who love ・Yokai, cryptids, and Japanese folklore ・Collecting and completing bestiaries ・Quick one-handed games for short breaks ・Dark, atmospheric Japanese horror

Screenshots

ArcEmu4 screens
KAII4 screens

Verdict

The call

The clearest difference is price: KAII at Free against ArcEmu's $1.99. KAII also leads on iOS requirement (13.0 vs 15.5). ArcEmu's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). On 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

CostPrice · In-app purchases · Ads · Monetization

KAII is free to download; ArcEmu costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ArcEmu ships an update every 2 weeks, KAII every 6 weeks. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
ArcEmu versus KAII: the parameters behind the verdict, then further details
ParameterArcEmuKAII
Price$1.99Free — better
Rating4.9 (1.3K ratings) — better—
Positive reviews94.5% of reviews—
Number of ratings1.3K — better—
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod, Apple TV, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.513.0 — better
Further details — not scored
Size172 MB78 MB
Age rating4+12+
DeveloperRaffaele D'Amatoyota hojo

Bugs and requests

ArcEmu

Reported bugs

3 issues
  • Occasional crashes
  • Graphical glitches with certain ROMs
  • Save data not transferring properly between devices

Requested features

6 requests
  • Add cheat/GameShark support
  • Improve volume controls
  • Implement fast forward/slow motion options
  • Allow multiple save slots per game
  • Improve Game Boy Color support
Show 1 more
  • Add joystick/button support for Apple Watch

KAII

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ArcEmu

No in-app purchases

None

KAII

No in-app purchases

Questions

Is ArcEmu free?
ArcEmu costs $1.99, with no in-app purchases.
Is KAII free?
KAII is free to download, with no in-app purchases.
Do ArcEmu or KAII have ads?
KAII shows ads; ArcEmu does not.
Which is updated more often, ArcEmu or KAII?
ArcEmu ships an update every 2 weeks, and KAII every 6 weeks. Most recently, ArcEmu was updated on October 19, 2026 and KAII on October 11, 2026.

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