# Revolution Prep vs SLU SAFE

The clearest difference is update cadence: Revolution Prep at every 3 months against SLU SAFE's every 21 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Revolution Prep ships an update every 3 months, SLU SAFE every 21 months. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Revolution Prep | SLU SAFE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (499 ratings)](https://appshunter.io/ios/app/revolution-prep/id1416262333/reviews)** | — |
| Number of ratings | **499** | — |
| Positive reviews | 63.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 21 months |
| Monetization | Free | — |
| Size | 45 MB | 31 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Revolution Prep](https://appshunter.io/developer/1416262332) | [Saint Louis University](https://appshunter.io/developer/377399050) |

## What reviewers say

### Revolution Prep

[App page](https://appshunter.io/ios/app/revolution-prep/id1416262333)

Instantly score your SAT, ACT, or PSAT practice exams by taking a picture of your test. Track your progress with detailed reports and analysis, all stored conveniently in one place. Self-proctor exams with built-in timing and audio cues.

**Highlights:** Instant scoring via phone camera, Detailed score reports and analysis, Practice exam results storage, Self-proctoring with timing and audio cues, Progress tracking

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Quick exam grading
- 👍 Easy to use
- 💡 Instant score reports
- 🚀 Saves time
- 👍 User-friendly navigation

**What reviewers complain about**

- 🐛 Automatic scoring broken
- 🐛 Scan feature errors
- 🐛 App crashes
- 🐛 Poorly designed app
- 🐛 Slow processing

**Reported bugs**

- Automatic scoring system is broken and useless.
- App crashes once a pic is taken to score an exam.
- Scan feature takes forever to process and gives error messages.
- App is terrible at grading exams.
- Scan feature requires multiple attempts to work.


### SLU SAFE

[App page](https://appshunter.io/ios/app/slu-safe/id6736794736)

**In-app purchases:** none


## Frequently asked questions

### Is Revolution Prep free?

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

### Is SLU SAFE free?

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

### Do Revolution Prep or SLU SAFE have ads?

Neither Revolution Prep nor SLU SAFE shows ads.

### Which is updated more often, Revolution Prep or SLU SAFE?

Revolution Prep ships an update every 3 months, and SLU SAFE every 21 months. Most recently, Revolution Prep was updated on September 23, 2026 and SLU SAFE on September 16, 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.*