# AVDI Assist vs DDTSB

The clearest difference is rating: DDTSB at 5.0 against AVDI Assist's 4.0. AVDI Assist's advantage is update cadence (every 3 months vs every 7 months) and iOS requirement (10.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

DDTSB holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

AVDI Assist ships an update every 3 months, DDTSB every 7 months. The most recent releases landed on November 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | AVDI Assist | DDTSB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/avdi-assist/id1113946941/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ddtsb/id6740241315/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 12 MB | 14 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KAPDIAGNOSTICS.COM LTD](https://appshunter.io/developer/1722077360) | [Elektro Partner ApS](https://appshunter.io/developer/1789123561) |

## What reviewers say

### AVDI Assist

[App page](https://appshunter.io/ios/app/avdi-assist/id1113946941)

This app provides a mobile solution for users of a specific diagnostic plan, offering access to a knowledge base, video manuals, forums, and a ticketing system. It also includes a feature to look up vehicle registration marks for targeted data.

**Highlights:** Access Knowledge Base, View Premium Video Manuals, Engage in AVDI Forums, Submit Support Tickets, Perform VRM Lookup Searches

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is AVDI Assist free?

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

### Is DDTSB free?

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

### Which has better reviews, AVDI Assist or DDTSB?

DDTSB is rated higher. AVDI Assist averages 4.0 out of 5 from 1 ratings, while DDTSB averages 5.0 from 1 ratings.

### Do AVDI Assist or DDTSB have ads?

Neither AVDI Assist nor DDTSB shows ads.

### Which is updated more often, AVDI Assist or DDTSB?

AVDI Assist ships an update every 3 months, and DDTSB every 7 months. Most recently, AVDI Assist was updated on November 2, 2026 and DDTSB on October 15, 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.*