# Pebbles Therapy vs ACT Prep

The clearest difference is in-app purchases: Pebbles Therapy at none against ACT Prep's 10. Pebbles Therapy also leads on update cadence (weekly vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ACT Prep sells 10 in-app purchases, starting at $4.99 per 7 days. Pebbles Therapy asks for nothing beyond the download.

Pebbles Therapy ships an update weekly, ACT Prep every 7 months. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Pebbles Therapy | ACT Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 7 months |
| Size | 122 MB | 53 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dr Geetha S](https://appshunter.io/developer/1697282787) | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) |

## What reviewers say

### Pebbles Therapy

[App page](https://appshunter.io/ios/app/pebbles-therapy/id6451242193)

**In-app purchases:** none


### ACT Prep

[App page](https://appshunter.io/ios/app/act-prep-practice-test-2026/id6523427865)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ACT Prep Weekly Full Access | $4.99 | per 7 days |
| ACT Weekly Full Access | $14.99 | per month |
| ACT Prep Monthly Full Access | $14.99 | per month |
| ACT Exam Monthly Full Access | $34.99 | per month |
| ACT Exam Quarterly Full Access | $55.99 | per 3 months |
| ACT Exam Quarterly Full Access | $59.99 | per 3 months |
| ACT Exam Semiannual Access | $75.99 | per 6 months |
| ACT Exam Semiannual Access | $79.99 | per 6 months |
| ACT Exam Annual Full Access | $109.99 | per year |
| ACT Exam Annual Full Access | $119.99 | per year |


## Frequently asked questions

### Is Pebbles Therapy free?

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

### Is ACT Prep free?

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

### Do Pebbles Therapy or ACT Prep have ads?

Neither Pebbles Therapy nor ACT Prep shows ads.

### Which is updated more often, Pebbles Therapy or ACT Prep?

Pebbles Therapy ships an update weekly, and ACT Prep every 7 months. Most recently, Pebbles Therapy was updated on October 17, 2026 and ACT Prep on October 1, 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.*