# Phone Diagnostics vs NSYS

The clearest difference is review sentiment: Phone Diagnostics at 63% against NSYS's 0%. Phone Diagnostics also leads on rating (3.8 vs 2.7) and update cadence (every 2 weeks vs every 2 months). NSYS's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Phone Diagnostics sells 1 one-off in-app purchase. NSYS asks for nothing beyond the download.

Phone Diagnostics holds the better App Store score, 3.8 against 2.7. That said, the two scores are not equally well evidenced: Phone Diagnostics has 86 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 63% of Phone Diagnostics's written reviews are positive against 0% of NSYS's.

Phone Diagnostics ships an update every 2 weeks, NSYS every 2 months. The most recent releases landed on August 29, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Phone Diagnostics | NSYS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (86 ratings)](https://appshunter.io/ios/app/phone-diagnostics/id1171677218/reviews)** | [2.7 (7 ratings)](https://appshunter.io/ios/app/nsys-test/id1448501054/reviews) |
| Number of ratings | **86** | 7 |
| Positive reviews | **63.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 35 MB | 29 MB |
| Requires iOS | 12 | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [HITEK_NOVA](https://appshunter.io/developer/1171677217) | [Grigoriy Glazman](https://appshunter.io/developer/1448501053) |

## What reviewers say

### Phone Diagnostics

[App page](https://appshunter.io/ios/app/phone-diagnostics/id1171677218)

Easily test and check all mobile device functionalities. This app is useful before purchasing a device, sending it for repair, or after receiving it back. It also helps you locate nearby repair shops.

**Highlights:** Test device functionalities, Check hardware before buying, Verify repairs, Find local repair shops, Improve QC processes, Facilitate trade-in

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Phone Diagnostics Pro | $4.99 | one-time |


### NSYS

[App page](https://appshunter.io/ios/app/nsys-test/id1448501054)

This utility app tests your knowledge of device functions. It simulates actions like making calls, connecting to Wi-Fi, and using sensors, cameras, and audio. It's designed to verify your understanding of how these features work.

**Highlights:** Simulates call functionality, Tests Wi-Fi connection, Verifies button interactions, Assesses sensor usage, Checks camera functionality, Evaluates audio recording/listening

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Phone Diagnostics free?

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

### Is NSYS free?

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

### Which has better reviews, Phone Diagnostics or NSYS?

Phone Diagnostics is rated higher. Phone Diagnostics averages 3.8 out of 5 from 86 ratings, while NSYS averages 2.7 from 7 ratings.

### Do Phone Diagnostics or NSYS have ads?

Neither Phone Diagnostics nor NSYS shows ads.

### Which is updated more often, Phone Diagnostics or NSYS?

Phone Diagnostics ships an update every 2 weeks, and NSYS every 2 months. Most recently, Phone Diagnostics was updated on August 29, 2026 and NSYS on September 12, 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.*