# Gradium vs OKKAI

The clearest difference is in-app purchases: Gradium at none against OKKAI's 2. OKKAI's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.5). On price and ads there is nothing between them.

Both are free to download. OKKAI sells 2 in-app purchases, starting at $8.99 per month. Gradium asks for nothing beyond the download.

## The numbers

| Metric | Gradium | OKKAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Size | 7 MB | 24 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Efim Polianovskii](https://appshunter.io/developer/1892655190) | [Eightbot OU](https://appshunter.io/developer/1894891000) |

## What reviewers say

### Gradium

[App page](https://appshunter.io/ios/app/gradium/id6762083335)

**In-app purchases:** none


### OKKAI

[App page](https://appshunter.io/ios/app/okkai-calorie-app/id6762630203)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $8.99 | per month |
| Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is Gradium free?

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

### Is OKKAI free?

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

### Do Gradium or OKKAI have ads?

Neither Gradium nor OKKAI shows ads.

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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.*