# SRF Diagnosis vs DND

The clearest difference is update cadence: DND at every 8 days against SRF Diagnosis's every 3 months. SRF Diagnosis's advantage is iOS requirement (14.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SRF Diagnosis ships an update every 3 months, DND every 8 days. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SRF Diagnosis | DND |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dnd/id6451104638/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | — | Free |
| Size | 1 MB | 339 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BERNSTEIN AG](https://appshunter.io/developer/731893093) | [MATL TECH INC.](https://appshunter.io/developer/1735263917) |

## What reviewers say

### SRF Diagnosis

[App page](https://appshunter.io/ios/app/srf-diagnosis/id1583956869)

**In-app purchases:** none


### DND

[App page](https://appshunter.io/ios/app/dnd/id6451104638)

This tool helps you understand your vehicle's health and diagnose issues. It provides comprehensive diagnostic services, maintenance guidance, and real-time sensor data monitoring, making car care accessible even for beginners.

**Highlights:** OBD functionality, Enhanced diagnosis, Vehicle maintenance guidance, Locate malfunction causes, AI services, Abnormal warnings, Real-time sensor data monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SRF Diagnosis free?

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

### Is DND free?

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

### Do SRF Diagnosis or DND have ads?

Neither SRF Diagnosis nor DND shows ads.

### Which is updated more often, SRF Diagnosis or DND?

SRF Diagnosis ships an update every 3 months, and DND every 8 days. Most recently, SRF Diagnosis was updated on October 9, 2026 and DND on October 24, 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.*