ShadetreeYou're the mechanic now.
Shadetree turns a cheap OBD-II adapter and your iPhone into a plain-English advisor for your car. See what it's actually saying, learn what's normal, and ask smarter questions with the real data in hand.
Works with inexpensive Bluetooth OBD-II adapters and most cars sold since 1996.
Your garage, at a glance
Live readings, judged honestly
Every reading, explained
Three steps to knowing your car.
Plug in an adapter
Common Bluetooth OBD-II adapters work. The adapter clicks into the port under your dash, the same one every shop uses.
Need one? We test with the Veepeak OBDCheck BLE+. Get it on Amazon
As an Amazon Associate, Shadetree earns from qualifying purchases.
See what your car is saying
Live readings from the engine, fuel, and emissions systems, each judged against what's normal for a healthy car. No mystery graphs.
Ask with the data in hand
One tap hands your car's real details and current readings to a search or AI assistant, so the answer is about your car, not a generic one.
Built for the owner, not the shop.
A note after every drive.
Drives record on their own with your phone in your pocket. When one ends, you get a short note: what peaked, what changed, and what to do first if something needs you.
Plain English, always.
Every sensor comes with an About section and a typical range. Coolant at 195°F reads as expected, not as a number you have to go look up.
Honest judgments.
Readings are marked Expected, Watch, or Action against your car's own normal. Every note says what it checked and what it could not, and how soon to act.
Ask about this car.
The question you'd type anyway, but carrying your year, engine, codes, and readings. Better input, better answer.
Trouble codes, decoded.
When a check-engine light comes on, you get the code, what it means, and the picture around it, before you decide what to do next.
Maintenance that fits.
A maintenance guide matched to your exact engine and transmission, not a one-size schedule for every car ever made.
Local first. Quiet by design.
- No account, no ads, no analytics SDKs. Shadetree doesn't know who you are.
- Your data stays on your iPhone, with optional sync through your own private iCloud.
- Ask and exports are always your tap. You see exactly what they carry before it goes.