# DDTSB vs MechNostic

The clearest difference is in-app purchases: DDTSB at none against MechNostic's 2. MechNostic's advantage is update cadence (every 9 days vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MechNostic sells 2 in-app purchases, starting at $12.99 per month. DDTSB asks for nothing beyond the download.

DDTSB ships an update every 7 months, MechNostic every 9 days. The most recent releases landed on September 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | DDTSB | MechNostic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ddtsb/id6740241315/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 14 MB | 63 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Elektro Partner ApS](https://appshunter.io/developer/1789123561) | [PAWROUTE LTD](https://appshunter.io/developer/1831848468) |

## What reviewers say

### DDTSB

[App page](https://appshunter.io/ios/app/ddtsb/id6740241315)

Access a vast database of automotive service bulletins and troubleshooting guides. Avoid common errors by leveraging solutions already found by other workshops globally. This tool provides detailed information on over 10,000 service bulletins and 400,000 error codes.

**Highlights:** 10,000+ service bulletins, 400,000+ error codes, Model-specific troubleshooting, Global mechanic community, Error explanations and experiences

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

**In-app purchases:** none


### MechNostic

[App page](https://appshunter.io/ios/app/mechnostic/id6757718278)

An AI-powered assistant for professional mechanics to diagnose vehicle faults. It helps analyze symptoms, DTCs, and live data to create structured diagnostic plans, reducing guesswork and unnecessary part replacements.

**Highlights:** AI-guided diagnostics, Analyze DTCs and symptoms, Structured diagnostic plans, Live vehicle data analysis, Step-by-step diagnostic checks, OBD2 integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MechNostic Pro | $12.99 | per month |
| MechNostic Pro – Yearly | $99.99 | per year |


## Frequently asked questions

### Is DDTSB free?

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

### Is MechNostic free?

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

### Do DDTSB or MechNostic have ads?

Neither DDTSB nor MechNostic shows ads.

### Which is updated more often, DDTSB or MechNostic?

DDTSB ships an update every 7 months, and MechNostic every 9 days. Most recently, DDTSB was updated on September 11, 2026 and MechNostic on September 23, 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.*