More than a calculator
Features hidden in plain sight
Solve fractions
Long press the division key to enter a fraction
Draw graphs
Type sin(x) and see the graph immediately
: You can find the specific patch on community-driven file-sharing sites like (approx. 164 MB) or through mirrors hosted on as noted by contributors on Official Source Peugeot ServiceBox
: Ensure your laptop is connected to a power source. A loss of power during a firmware update can "brick" your diagnostic interface.
Download now and discover the power of Diagbox 7.58!
Yes. Version 7.58 works perfectly with v4.3.5 and v4.3.6. Avoid updating interface firmware to v4.4.0 or higher – that’s DiagBox 9.x territory.
A known issue in v7.57 involving the configuration of the additive pouch replacement on certain models (like the Berlingo B9) is corrected in v7.58.
a clean, stable version 7.01, and slowly re-apply updates (7.02, 7.03, up to 7.57) using trusted, verified patch files found on established Peugeot/Citroen diagnostic forums.
Features hidden in plain sight
Long press the division key to enter a fraction
Type sin(x) and see the graph immediately
Pick the simple, classic or modern layout to fit your workflow perfectly
Whether you are cooking, working on a science project or checking dimensions, we have the converter you need
Travel the world with confidence or track exchange rates seamlessly even without an internet connection
: You can find the specific patch on community-driven file-sharing sites like (approx. 164 MB) or through mirrors hosted on as noted by contributors on Official Source Peugeot ServiceBox
: Ensure your laptop is connected to a power source. A loss of power during a firmware update can "brick" your diagnostic interface.
Download now and discover the power of Diagbox 7.58!
Yes. Version 7.58 works perfectly with v4.3.5 and v4.3.6. Avoid updating interface firmware to v4.4.0 or higher – that’s DiagBox 9.x territory.
A known issue in v7.57 involving the configuration of the additive pouch replacement on certain models (like the Berlingo B9) is corrected in v7.58.
a clean, stable version 7.01, and slowly re-apply updates (7.02, 7.03, up to 7.57) using trusted, verified patch files found on established Peugeot/Citroen diagnostic forums.
"Love this app! It deserves to be at the top. Slick UI, lovely design and features you never thought you need until you realise you do."
"Best calculator app. Has everything you need unless you are doing PhD in combined mathematics."
"Amazing app for a calculation nerd like me. Totally worth full purchase price to go ad free and support the developers."
"In a world of oversimplified apps, this one has every tool you can ever need. Please don't change it!"
Have a feature request or found a bug? Let us know.