# Phone Tester vs CaspiAPI

The clearest difference is in-app purchases: CaspiAPI at none against Phone Tester's 4. CaspiAPI also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Phone Tester sells 4 in-app purchases, starting at $0.99 per 7 days. CaspiAPI asks for nothing beyond the download.

Phone Tester ships an update every 3 weeks, CaspiAPI every 4 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Phone Tester | CaspiAPI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 12 MB | 26 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Grima Hdez](https://appshunter.io/developer/1741481582) | [Muhammed Ismayilov](https://appshunter.io/developer/1829143226) |

## What reviewers say

### Phone Tester

[App page](https://appshunter.io/ios/app/phone-tester-dead-pixel-test/id6742501337)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Device Monitor Pro Weekly | $0.99 | per 7 days |
| Device Monitor Pro Monthly | $1.99 | per month |
| Device Monitor Pro Yearly | $2.99 | per year |
| Device Monitor Pro Lifetime | $3.99 | one-time |


### CaspiAPI

[App page](https://appshunter.io/ios/app/caspiapi-api-client/id6780876283)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Phone Tester free?

Phone Tester is free to download, with in-app purchases available.

### Is CaspiAPI free?

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

### Do Phone Tester or CaspiAPI have ads?

Phone Tester shows ads; CaspiAPI does not.

### Which is updated more often, Phone Tester or CaspiAPI?

Phone Tester ships an update every 3 weeks, and CaspiAPI every 4 days. Most recently, Phone Tester was updated on October 30, 2026 and CaspiAPI on October 28, 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.*