# Project SPECTRA! vs ESAT Prep

The clearest difference is in-app purchases: Project SPECTRA! at none against ESAT Prep's 2. Project SPECTRA! also leads on iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ESAT Prep sells 2 in-app purchases, starting at $19.99 per year. Project SPECTRA! asks for nothing beyond the download.

## The numbers

| Metric | Project SPECTRA! | ESAT Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | — |
| Size | 13 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### Project SPECTRA!

[App page](https://appshunter.io/ios/app/project-spectra/id1561634722)

**Features:** macOS Compatibility

**In-app purchases:** none


### ESAT Prep

[App page](https://appshunter.io/ios/app/esat-prep/id6793019077)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Premium | $19.99 | per year |
| Lifetime Access | $34.99 | one-time |


## Frequently asked questions

### Is Project SPECTRA! free?

Project SPECTRA! is free to download, with no in-app purchases.

### Is ESAT Prep free?

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

### Do Project SPECTRA! or ESAT Prep have ads?

Neither Project SPECTRA! nor ESAT Prep 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.*