One view of every vehicle
Each vehicle's health on one screen: which ones are fine, which need a look, and why. No more asking drivers what the dash says.
For fleets · Planned, not built yet
Every vehicle's health, in one place.
That's the plan for Tachwise fleets, and it isn't built yet. Today Tachwise is a free app beta that reads one car at a time. If you run a small fleet of cars, pickups or vans, join the fleet waitlist and tell us what you need: your answers decide whether we build it.
The Tachwise device is built for light-duty vehicles (OBD-II): cars, SUVs, pickups and vans. Heavy trucks or other CAN bus equipment? We take on custom device builds.
Planned
What a fleet manager would get.
None of this exists yet. It's what we plan to build if enough fleets ask for it.
Battery and fault alerts before a no-start
The Tachwise device is being built to watch a battery's resting voltage and cranking dip while the vehicle sits in the yard, and to read pending fault codes before the check-engine light comes on. The aim: a weak battery shows up as a trend, not as a morning a vehicle won't start.
Maintenance due
Service reminders for each vehicle by miles or months, so oil changes and inspections don't slip between drivers.
Codes in plain language
Trouble codes explained the way the app beta already explains them for one car: what the code means and how soon it needs a look, for every vehicle in the fleet.
Works today
One car at a time.
The free app beta works now, with each driver's own ELM327 dongle. There is no fleet view yet.
The free app beta
A driver plugs a Bluetooth Low Energy ELM327 dongle (Veepeak, Vgate and many others) into the vehicle's port and opens the app. It reads codes and live data for that one vehicle. No account needed.
- One car at a time. Each driver connects to the vehicle they're in.
- Each driver's own dongle and phone: Chrome on Android, or a desktop or laptop with Bluetooth. No iPhone yet.
- Only while connected. A dongle sees the vehicle while the phone is in it and the app is open.
- It's a beta. Expect rough edges.
app.tachwise.com
What a fleet can't do yet
So nobody is surprised, here is what doesn't exist today.
- No fleet overview. A manager can't see vehicles they aren't connected to.
- No accounts or sync. What a driver sees stays on their phone.
- No alerts to a manager. Nothing is sent anywhere.
- No Tachwise device yet. The in-car board that watches a parked vehicle is a prototype: it has run in a car, and its own circuit board is ready for production.
Free. No commitment.
What's supported
Light-duty off the shelf.
Light-duty off the shelf.
Anything on CAN bus, built to order.
The Tachwise device reads the OBD-II port, so off the shelf it works with light-duty vehicles. For heavy trucks and other machines that run on CAN bus, we build custom devices by project.
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Supported: cars, SUVs, pickups and vansLight-duty vehicles with an OBD-II port. Nearly every car and light truck sold in North America since the late 1990s has one; in the US, every gasoline car and light truck from the 1996 model year. How much data each vehicle shares varies by make.
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Custom build: heavy trucks and other CAN bus equipmentHeavy trucks use a different standard, SAE J1939, usually through a round 9-pin connector, and the off-the-shelf Tachwise device doesn't read it. The same goes for construction and farm equipment, buses, marine engines and other machines on CAN bus. For those, we develop a custom device for your fleet: scoped with you, built and tested on our bench first. How custom builds work.
Roadmap
An honest roadmap.
Where fleets stand today, and what has to happen first.
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Now
The fleet waitlist
This page. We're finding out how many fleets want this, what they drive and what they use today.
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Now
The app beta, one car at a time
Works today with each driver's own ELM327 dongle. Separately, the in-car board that watches a parked vehicle's battery is a prototype with its own circuit board ready for production; its next milestone is working in a real car, overnight.
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Next, if fleets ask
A design for fleets
Accounts, roles, what a manager can see, and how drivers are told and asked for consent, written down before anything is built.
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Later
Several vehicles in one app
A fleet overview, accounts and sync, so a manager sees vehicles they don't personally connect to.
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When it's ready
No dates, no fleet prices yet
We'll set them when we can keep them. The fleet waitlist hears first.
FAQ
Straight answers for fleets.
Does it work with heavy trucks?
Not off the shelf. Heavy-duty trucks use SAE J1939, not OBD-II, and the standard Tachwise device reads OBD-II only: cars, SUVs, pickups and vans.
We do build custom devices for heavy trucks and other CAN bus equipment, by project: we agree the scope with you, then build and test on our bench before anything goes on a vehicle. Tick "Heavy-duty trucks" on the form, or make a partner enquiry to talk about a custom build.
What will it cost for a fleet?
We haven't decided. The app beta is free today. We won't quote fleet prices until fleet features exist, and we won't take any money before then. Joining the fleet waitlist is free and commits you to nothing.
Does Tachwise track where vehicles are?
No. The fleet features we're planning are about vehicle health, not location, and GPS tracking isn't part of the plan. If you need live location today, fleet platforms such as Geotab, Samsara and Motive, and LTE trackers such as Bouncie and Vyncs, do that.
What about driver privacy?
Today nothing is shared: the app beta keeps each vehicle's data on the phone that connected to it, and sending anything to Tachwise is off unless the driver turns it on.
Before any fleet feature is built, we'll decide and write down exactly what a manager can see and how drivers are told and asked for consent. Fleet features are planned to show vehicle health, not how someone drives.
Tachwise is based in Canada, and your fleet waitlist details are stored on servers in Canada.
Can my drivers use the app beta now?
Yes, one vehicle at a time. Each driver needs a Bluetooth Low Energy ELM327 dongle and Chrome on Android or a desktop. There's no fleet view, so each driver sees only the vehicle they're connected to, and you see nothing centrally.
Do I have to tick the email box to join?
No. You're on the fleet waitlist either way. Tick it if you'd like us to email you about launches and the beta; you can unsubscribe any time.
Learn
Reading for fleet managers.
Straight answers with their sources, useful whether or not you ever use Tachwise.
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How should a small fleet schedule preventive maintenance?
Intervals by distance, time and use, and how to keep them from slipping between drivers.
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When should a fleet replace vehicle batteries?
Age, testing and the warning signs, so a battery is replaced before it strands a vehicle.
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How much does idling cost a fleet?
Fuel burned per hour of idling, and what that adds up to across a fleet.
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What should a pre-trip inspection cover for light-duty fleet vehicles?
What the rules require and what is simply good practice, kept apart.
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What vehicle health data can OBD-II give a fleet manager?
What the standard port shares, what it doesn't, and what that means for a fleet.
Tell us about
your fleet.
Join the free fleet waitlist. No payment, no commitment. Your answers decide whether, and what, we build for fleets.