# Compound Calculator vs Engram AI

The clearest difference is price: Engram AI at Free against Compound Calculator's $0.99. Engram AI also leads on in-app purchases (none vs 3) and iOS requirement (15.1 vs 17.6). On ads and device support there is nothing between them.

Engram AI is free to download; Compound Calculator costs $0.99 up front. Compound Calculator sells 3 in-app purchases, starting at $2.99 per month. Engram AI asks for nothing beyond the download.

## The numbers

| Metric | Compound Calculator | Engram AI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 5 MB | 29 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [Khaled Albreiki](https://appshunter.io/developer/1894993634) |

## 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 |


### Engram AI

[App page](https://appshunter.io/ios/app/engram-ai/id6762748308)

**In-app purchases:** none


## Frequently asked questions

### Is Compound Calculator free?

Compound Calculator costs $0.99, and also offers in-app purchases.

### Is Engram AI free?

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

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

Neither Compound Calculator nor Engram 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.*