18+ iOS apps & games curated and reviewed
Out of 18+ koya nambo apps and games on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (16) | Yes | Yes | Jul 2026 |
| 2 |  | Free | 5.0★ (1) | Yes | Yes | May 2026 |
| 3 |  | Free | — | Yes | No | May 2026 |
| 4 |  | Free | — | Yes | Yes | Jul 2026 |
| 5 |  | Free | — | Yes | Yes | Jul 2026 |
| 6 |  | Free | — | — | No | Jul 2026 |
| 7 |  | Free | — | Yes | Yes | May 2026 |
| 8 |  | Free | — | Yes | No | May 2026 |
Easily convert between Japanese and US units for length, weight, speed, volume, temperature, area, currency, and time zones. This tool is useful for travel, daily life, work, and study, offering a wide range of conversion categories.
Enhance your arithmetic abilities with daily exercises. This application offers various modes to sharpen your calculation speed and mental math skills. Practice with randomly generated problems to keep your brain active.
Easily switch numbers between various bases, from binary to base 62. Ideal for developers, students, and math enthusiasts needing quick and reliable conversions with fractional parts. Features include instant common base conversions, custom base support, and conversion history.
An interactive game and guide for exploring Japan's Kōyasan. Discover historical sites with detailed descriptions and engage in 12 location-triggered challenges to deepen your understanding of this sacred destination.
Engage in a simple rule puzzle RPG where you strategically battle enemies and navigate treacherous dungeons. Collect items from treasure chests, evade pursuing monsters, and uncover a story of gods and giants to help Nike escape Tartarus.
Create deeply customizable AI characters with on-device memory and local LLM support. Generate images and video within chats, explore branching storylines, and enjoy voice conversations. Offers extensive customization for writers and worldbuilders.
