# Synapse vs ServiceTests

The clearest difference is in-app purchases: ServiceTests at none against Synapse's 3. ServiceTests also leads on update cadence (daily vs every 6 days). On price, ads, device support and iOS requirement there is nothing between them.

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

Synapse ships an update every 6 days, ServiceTests daily. The most recent releases landed on September 19, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | Synapse | ServiceTests |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 12 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nexus Link LLC](https://appshunter.io/developer/1521266947) | [Thanh Nguyen](https://appshunter.io/developer/6777103907) |

## What reviewers say

### 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 |


### ServiceTests

[App page](https://appshunter.io/ios/app/servicetests/id6790297735)

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

**In-app purchases:** none


## Frequently asked questions

### Is Synapse free?

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

### Is ServiceTests free?

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

### Do Synapse or ServiceTests have ads?

Neither Synapse nor ServiceTests shows ads.

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

Synapse ships an update every 6 days, and ServiceTests daily. Most recently, Synapse was updated on September 19, 2026 and ServiceTests on August 18, 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.*