# Compound Calculator vs Plain AI

The clearest difference is in-app purchases: Plain AI at none against Compound Calculator's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Compound Calculator sells 3 in-app purchases, starting at $2.99 per month. Plain AI asks for nothing beyond the download.

## The numbers

| Metric | Compound Calculator | Plain AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 5 MB | 16 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [Jarle Hansen](https://appshunter.io/developer/563222855) |

## What reviewers say

### Compound Calculator

[App page](https://appshunter.io/ios/app/compound-calculator-lite/id6749442265)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compound Calculator - Pro 30days | $2.99 | per month |
| Compound Calculator - Pro 360days | $14.99 | per year |
| Compound Calculator Pro - lifetime | $19.99 | one-time |


### Plain AI

[App page](https://appshunter.io/ios/app/plain-ai/id6753973258)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Compound Calculator free?

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

### Is Plain AI free?

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

### Do Compound Calculator or Plain AI have ads?

Neither Compound Calculator nor Plain AI 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.*