# Sonder's EPTA vs ATC Aptitude Prep

The clearest difference is update cadence: Sonder's EPTA at weekly against ATC Aptitude Prep's every 3 months. Sonder's EPTA also leads on iOS requirement (15.0.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sonder's EPTA sells 1 in-app purchase, starting at $19.99 per month and ATC Aptitude Prep sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Sonder's EPTA ships an update weekly, ATC Aptitude Prep every 3 months. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sonder's EPTA | ATC Aptitude Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Size | 41 MB | 6 MB |
| Requires iOS | **15.0.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [senam Namkung](https://appshunter.io/developer/6777046675) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### Sonder's EPTA

[App page](https://appshunter.io/ios/app/sonders-epta/id6777046673)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EPTA Premium | $19.99 | per month |


### ATC Aptitude Prep

[App page](https://appshunter.io/ios/app/atc-aptitude-prep-practice/id6790246419)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Annual | $49.99 | per year |
| Lifetime Access | $99.99 | one-time |


## Frequently asked questions

### Is Sonder's EPTA free?

Sonder's EPTA is free to download, with in-app purchases available.

### Is ATC Aptitude Prep free?

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

### Do Sonder's EPTA or ATC Aptitude Prep have ads?

Neither Sonder's EPTA nor ATC Aptitude Prep shows ads.

### Which is updated more often, Sonder's EPTA or ATC Aptitude Prep?

Sonder's EPTA ships an update weekly, and ATC Aptitude Prep every 3 months. Most recently, Sonder's EPTA was updated on October 17, 2026 and ATC Aptitude Prep on October 25, 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.*