# Robot Emil vs Kaira

The clearest difference is in-app purchases: Robot Emil at none against Kaira's 2. Robot Emil also leads on iOS requirement (12.0 vs 17.0). Kaira's advantage is update cadence (every 10 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Kaira sells 2 in-app purchases, starting at $4.99 per month. Robot Emil asks for nothing beyond the download.

Robot Emil ships an update every 3 months, Kaira every 10 days. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Robot Emil | Kaira |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 98 MB | 3 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Indicia, s.r.o.](https://appshunter.io/developer/1517645365) | [Spartak Kagramanyan](https://appshunter.io/developer/1891936181) |

## What reviewers say

### Robot Emil

[App page](https://appshunter.io/ios/app/robot-emil/id1425795571)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kaira

[App page](https://appshunter.io/ios/app/kaira-math/id6761885184)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaira: Math Premium | $4.99 | per month |
| Kaira: Math Premium | $29.99 | per year |


## Frequently asked questions

### Is Robot Emil free?

Robot Emil is free to download, with no in-app purchases.

### Is Kaira free?

Kaira is free to download, with in-app purchases available.

### Do Robot Emil or Kaira have ads?

Neither Robot Emil nor Kaira shows ads.

### Which is updated more often, Robot Emil or Kaira?

Robot Emil ships an update every 3 months, and Kaira every 10 days. Most recently, Robot Emil was updated on October 8, 2026 and Kaira on October 10, 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.*