# Kotoro vs Efemeris

The clearest difference is update cadence: Kotoro at every 6 weeks against Efemeris's every 8 months. Kotoro also leads on price ($0.99 vs $3.99) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Kotoro costs $0.99 and Efemeris $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kotoro ships an update every 6 weeks, Efemeris every 8 months. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Kotoro | Efemeris |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| Rating | **[4.7 (118 ratings)](https://appshunter.io/ios/app/kotoro/id779855682/reviews)** | — |
| Number of ratings | **118** | — |
| Positive reviews | 90.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 8 months |
| Monetization | Paid | — |
| Size | 108 MB | 130 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Semidome Inc.](https://appshunter.io/developer/779855685) | [DTDA Games](https://appshunter.io/developer/1291540307) |

## What reviewers say

### Kotoro

[App page](https://appshunter.io/ios/app/kotoro/id779855682)

An atmospheric puzzle game where you mix colors to achieve target hues. Explore 8 chapters and 96 unique challenges based on fundamental color theory principles. Enjoy a relaxing experience with a beautiful soundtrack and minimalist design.

**Highlights:** Color mixing puzzles, 8 chapters with unique mechanics, 96 challenging levels, Atmospheric soundtrack, Minimalist and dreamy visuals, iCloud progress sync

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎨 Beautiful, minimalist visual design
- 🎵 Excellent, soothing soundtrack
- 🧩 Clever, original puzzle mechanics
- 🎯 Easy to learn, difficult to master
- 😌 Relaxing and calming gameplay experience

**What reviewers complain about**

- 🔊 No option to turn off sound/music
- 🎨 Poor color choices for colorblind players
- 📱 iPhone audio issues (music doesn't play)
- ⏱️ Limited content (only 72 levels)
- 🐛 Game crashes and glitches

**Reported bugs**

- Music doesn't play on iPhone (works on iPad)
- App crashes frequently
- Incompatible with iOS 11 and newer (32-bit limitation)
- App compatibility warning on newer iOS versions

**Requested features**

- More levels and content
- Sound toggle/mute option
- Colorblind mode with textures or symbols
- Additive color (RGB) mixing levels
- On-demand tutorial system


### Efemeris

[App page](https://appshunter.io/ios/app/efemeris/id1667323204)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kotoro free?

Kotoro costs $0.99, with no in-app purchases.

### Is Efemeris free?

Efemeris costs $3.99, with no in-app purchases.

### Do Kotoro or Efemeris have ads?

Neither Kotoro nor Efemeris shows ads.

### Which is updated more often, Kotoro or Efemeris?

Kotoro ships an update every 6 weeks, and Efemeris every 8 months. Most recently, Kotoro was updated on October 17, 2026 and Efemeris on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*