# Ampere vs ASTB APP

The clearest difference is in-app purchases: Ampere at none against ASTB APP's 2. ASTB APP's advantage is update cadence (every 2 weeks vs every 145 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ASTB APP sells 2 in-app purchases, starting at $17.99 per month. Ampere asks for nothing beyond the download.

Ampere ships an update every 145 months, ASTB APP every 2 weeks. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Ampere | ASTB APP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astb-app/id6762574045/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 145 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 4 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Scott Beilfuss](https://appshunter.io/developer/914596608) | [Tembn L.L.C.](https://appshunter.io/developer/1894726572) |

## What reviewers say

### Ampere

[App page](https://appshunter.io/ios/app/ampere/id914596604)

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

**In-app purchases:** none


### ASTB APP

[App page](https://appshunter.io/ios/app/astb-app/id6762574045)

Prepare for the Aviation Selection Test Battery (ASTB) with adaptive practice questions and full-length timed tests. Features an AI tutor and specialized drills for performance-based measures, ensuring you're ready for your crucial exam.

**Highlights:** Adaptive practice questions using Item Response Theory, Full-length timed practice tests with OAR score calculation, AI tutor for step-by-step concept explanations, 61 Performance Based Measures (PBM) drills, Spaced repetition for missed questions, Covers all four ASTB-E scored sections

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $17.99 | per month |
| ASTB Testing Site | $48.99 | one-time |


## Frequently asked questions

### Is Ampere free?

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

### Is ASTB APP free?

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

### Do Ampere or ASTB APP have ads?

Neither Ampere nor ASTB APP shows ads.

### Which is updated more often, Ampere or ASTB APP?

Ampere ships an update every 145 months, and ASTB APP every 2 weeks. Most recently, Ampere was updated on November 11, 2026 and ASTB APP on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*