You want to buy a diagnostic tool and keep encountering the same brands: Topdon, Autel, Launch, and OBDeleven. All good, but they are not the same. One is an app on your phone, the other a complete handheld device for the workshop. In this guide, we explain what each brand excels at, so you quickly know which one suits you.
Short answer upfront: if you want to read fault codes cheaply, choose Topdon or Autel. If you drive a VW, Audi, or BMW and want to code, choose OBDeleven. If you seriously tinker with all brands, choose Launch.
The four brands in brief
Topdon. Wide range with good value for money. From a cheap dongle (CarPal) to complete handheld devices. Great for those who want reliable reading without spending much.
Autel. The professional brand you see in many garages. Strong vehicle coverage and reliable diagnostics. From the affordable app dongle AP200 to heavy-duty workshop tablets.
Launch. Known for complete handheld devices with full system diagnostics, active tests, and service functions. Ideal if you maintain many different cars.
OBDeleven. An app scanner that excels in VAG (VW, Audi, Seat, Skoda) and also supports BMW, Mercedes, and Toyota. Strong in coding and enabling hidden functions. The affordable alternative to VCDS.
Which type suits you?
App scanner (phone). OBDeleven, Topdon CarPal, and Autel AP200 work via a dongle plus app. Cheap, compact, and easy. Ideal for home use and reading fault codes.
Handheld device (own screen). Launch and the larger Topdon and Autel models have their own screen. No phone needed, more features like active tests. Better for those who tinker a lot.
Coding and hidden functions. OBDeleven is the clear choice for this, especially on VAG and BMW. You can safely enable functions with the One-Click Apps.
Our recommendations per brand
Four popular models, each a good starting point within its brand:
View the Topdon TopScan Master → 
View the Autel AP200 → 
View the Launch CRP919X → 
View the OBDeleven 3 →
Topdon TopScan Master (around €170) and Autel AP200 (around €69) are good app scanners. The Launch CRP919X (around €440) is a full handheld device. The OBDeleven 3 (around €77) is the choice for coding.
Frequently Asked Questions
What is the best brand of diagnostic tool?
There is no single winner; it depends on your goal. For cheap diagnostics, Topdon and Autel are strong, for coding OBDeleven, and for full workshop diagnostics Launch.
Do all these brands work on every car?
For standard fault codes (OBD2) they work on almost any car from 2001 onwards. For deeper diagnostics and coding, coverage varies by brand and model; OBDeleven is strongest on VAG and BMW.
App scanner or handheld device: which is better?
An app scanner is cheaper and more compact, ideal for home use. A handheld device has its own screen and more functions, better if you work a lot and on different brands.
Do I need an expensive device?
No. For reading and clearing fault codes, an app scanner costing a few tens is sufficient. An expensive handheld device only pays off with intensive use.
In short
Topdon and Autel are strong and affordable for diagnostics, OBDeleven is the best choice for coding on VAG and BMW, and Launch is recommended for full diagnostics without a laptop. View and compare all brands in our diagnostic tools collection or read our buying guide to diagnose a used car yourself.