
About
This app acts as an AI mechanic, interpreting OBD2 fault codes and car service history to identify likely issues. It provides guided checklists and detailed explanations, helping users understand and manage car repairs.
What's New in Pistonly
1.5
August 18, 2026
ASK ABOUT YOUR CAR, NOT JUST READ CODES After the AI gives its verdict you can keep asking: what to check first, whether it's safe to drive, what the repair usually costs. The diagnostician already knows this car's codes, its history and what it told you last time, so you don't re-explain anything. Pro. FREE REPAIRS YOU DIDN'T KNOW ABOUT Pistonly now checks the manufacturer's safety recalls for your model and year. Recall work is done free of charge by a dealer, whoever owns the car now, and most owners never find out. Campaigns the regulator marks "do not drive" or "park outside" are flagged in red. DRIVE MODE Phone in the mount, speed in huge digits, revs as a bar you can read at a glance, best acceleration times and the distance of this drive. The screen stays awake while it's open. Pro. MODULE SCANS THAT SURVIVE A DROPPED CONNECTION The scan used to save nothing until it finished: lose the link at address sixty and the whole hour was gone. Now every address is saved the moment it answers, you can stop the scan on purpose, and the next run picks up exactly where it left off instead of starting over. MODULES OTHER OWNERS ALREADY FOUND Addresses confirmed on cars of the same model and generation now show up before you scan anything. You can read codes from them right away; clearing still waits until the address is confirmed on your own car, because clearing writes to the module. ALSO • Stop and resume applies to reading and clearing codes in bulk too. • The "can I drive" verdict is passed into the AI analysis, so the banner and the AI can't contradict each other.
MoreSubscription plans
Pistonly Pro — Monthly
Unlimited AI diagnoses and every pro tool.
In-App Purchases
$39.99
Pistonly Pro Lifetime
Lifetime access to all premium features
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FAQ
What is Pistonly?
Pistonly is an AI-powered car diagnostics app that reads OBD2 fault codes, analyzes your car's service history, and provides likely causes and repair checklists. It aims to simplify car maintenance for users.
How does Pistonly's AI diagnostician work?
You add your car by VIN, input fault codes, and the AI analyzes this data along with your service history to rank likely causes and generate a guided checklist. It learns from your input as you tick off fixes.
Can Pistonly read codes from any OBD2 scanner?
Yes, Pistonly can read fault codes from any OBD2 scanner or diagnostic report. You can also manually enter codes if you don't have an adapter.
What features are included in the free version of Pistonly?
The free version offers 3 AI analyses per month, fault-code reading with plain-English descriptions, a garage and service book, control unit browsing, live sensors, Mode 06, readiness checks, and an acceleration test.
What are the benefits of Pistonly Pro?
Pistonly Pro provides unlimited AI diagnoses, a drive log for AI sensor analysis, odometer rollback checks, service functions like actuator tests and resets, enhanced PIDs, and CSV data logging. It also supports multiple cars.
Does Pistonly have ads?
No, Pistonly does not have advertisements. The app offers a free tier with limitations and a premium subscription for full access.
What devices does Pistonly support?
Pistonly is available on iPhone and iPad devices, running on iOS.
How often is Pistonly updated?
Pistonly was last updated on July 31, 2026, with version 1.2. The release date was July 21, 2026.







