# DeviceTestApp vs Synapse

The clearest difference is in-app purchases: DeviceTestApp at none against Synapse's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Synapse sells 3 one-off in-app purchases. DeviceTestApp asks for nothing beyond the download.

DeviceTestApp ships an update every 11 days, Synapse every 6 days. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | DeviceTestApp | Synapse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/synapse-device-check/id6781245296/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 5 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GALAXY TELECOM](https://appshunter.io/developer/905658140) | [Nexus Link LLC](https://appshunter.io/developer/1521266947) |

## What reviewers say

### DeviceTestApp

[App page](https://appshunter.io/ios/app/devicetestapp/id6758030896)

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

**In-app purchases:** none


### Synapse

[App page](https://appshunter.io/ios/app/synapse-device-check/id6781245296)

Assess the hardware functionality of a device before buying or selling. It performs comprehensive on-device checks for cameras, sensors, connectivity, and more, generating a shareable certificate of its condition. This ensures transparency and confidence in transactions.

**Highlights:** On-device hardware testing, Comprehensive sensor checks, Shareable pass/fail certificate, No account or data sharing, Quick free check available, Full diagnostic for purchase

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Diagnostic | $2.99 | one-time |
| 3 Checks — Best Value | $4.99 | one-time |
| 10 Checks — Pro Pack | $9.99 | one-time |


## Frequently asked questions

### Is DeviceTestApp free?

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

### Is Synapse free?

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

### Do DeviceTestApp or Synapse have ads?

Neither DeviceTestApp nor Synapse shows ads.

### Which is updated more often, DeviceTestApp or Synapse?

DeviceTestApp ships an update every 11 days, and Synapse every 6 days. Most recently, DeviceTestApp was updated on September 17, 2026 and Synapse on September 19, 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.*