16+ iOS apps & games curated and reviewed
Out of 16+ koya nambo apps and games on iOS, 15 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 | 5.0★ (1) | Yes | Yes | May 2026 |
| 2 |  | Free | 4.8★ (16) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 3.0★ (2) | Yes | Yes | Jun 2026 |
| 4 |  | Free | — | Yes | No | May 2026 |
| 5 |  | Free | — | Yes | Yes | Jul 2026 |
| 6 |  | Free | — | No | Yes | Jun 2026 |
| 7 |  | Free | — | Yes | Yes | May 2026 |
| 8 |  | Free | — | Yes | Yes | Jul 2026 |
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 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.
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.
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.
