# Test Doctor vs ACT Prep

The clearest difference is update cadence: Test Doctor at every 4 days against ACT Prep's every 7 months. Test Doctor also leads on iOS requirement (11.4 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Test Doctor sells 1 one-off in-app purchase and ACT Prep sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Test Doctor ships an update every 4 days, ACT Prep every 7 months. The most recent releases landed on September 18, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Test Doctor | ACT Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/test-doctor-act-math/id1426702602/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 74 MB | 53 MB |
| Requires iOS | **11.4** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wayfare Apps, LLC](https://appshunter.io/developer/1139266447) | [Snap Prep OU](https://appshunter.io/developer/1711932790) |

## What reviewers say

### Test Doctor

[App page](https://appshunter.io/ios/app/test-doctor-act-math/id1426702602)

This app helps you prepare for the ACT Math section with a smart diagnostic test. It identifies your strengths and weaknesses, then provides personalized study suggestions, articles, and practice problems for efficient learning.

**Highlights:** Smart diagnostic test, Personalized study suggestions, Study articles, Example problems, Targeted practice problems

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Full Version | $2.99 | one-time |


### 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 Test Doctor free?

Test Doctor is free to download, with in-app purchases available.

### Is ACT Prep free?

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

### Do Test Doctor or ACT Prep have ads?

Neither Test Doctor nor ACT Prep shows ads.

### Which is updated more often, Test Doctor or ACT Prep?

Test Doctor ships an update every 4 days, and ACT Prep every 7 months. Most recently, Test Doctor was updated on September 18, 2026 and ACT Prep on May 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.*