The control center for your GM EV
EV Control Center runs on the center screen of your vehicle. It shows what the battery is doing right now, learns how far your vehicle really goes, records every drive and charge, plans trips with charging stops and keeps your costs. It only reads vehicle data, never changes a setting, and keeps your trips and history on the vehicle.
Join the Free Beta Watch the TourVersion 3.4.3 · October 2026 · Developed on a 2024 GMC Sierra EV Denali Edition 1
See It on the Screen
About a minute of what's new in 3.3: road reach worked out on your vehicle, your drive colored as you go, Keep Driving through a stop, and asking what's new.
Recorded on the Android Automotive emulator with demo data.
Help for Every Screen
A visual guide built into the app, with real pictures of every screen.
- Numbered spots on each picture: tap a number to learn what that spot does.
- Open This Screen takes you from a Help page straight to that screen.
- Read It to Me reads a page aloud, also while you drive.
- Search Help when you're parked: type a word like towing or backup.
- Ask your vehicle "How do I...?" and hear the steps.
- Start Here: a 1-minute tour of the app in six steps.
Tap Help in the rail, or the ? at the top of any screen to open Help at the page for that screen.
Ask Your Vehicle, or Your Own AI
Tap the mic and ask. Battery, range, charging, costs and "How do I..." questions are answered from the app's own figures. Anything else can go to your own Claude, ChatGPT, Gemini, Grok or Muse Spark with your key: the answer uses your vehicle's figures and is read aloud. Your account pays, usually a fraction of a cent a question; your key stays on the vehicle, and where you are is never sent. No typing a long key on the vehicle: paste it on your phone or computer into the document EV Control Center keeps in your Google Drive, after its = sign (your own HERE key too, since 3.3.3), then tap Get Keys From Google Drive.
Ask anything, about your vehicle or not: "What's my average speed?", "How much of my driving is stopped at lights?", "Tell me about the European Union". The AI gets a summary of what the app records (driving time and speed, stops, efficiency, charging, costs against gas, battery health), never where you are. For news, scores and other current questions it searches the web, billed to your key.
| Measured with 34 questions | Claude | ChatGPT | Gemini | Grok | Muse Spark |
|---|---|---|---|---|---|
| Typical answer time | 1.3 s | 1.3 s | 1.8 s | 1.2 s | 2.9 s |
| Cost per question (your account) | about 0.15¢ | about 0.13¢ | about 0.07¢ | about 0.16¢ | about 0.22¢ |
| With a web search (news, scores) | about 2.5¢, 2 to 4 s | 1.5 to 3.5¢, 2 to 6 s | about 1.5¢, 4 to 6 s | 1.5 to 2.6¢, 1.5 to 3 s | 1.1 to 2.5¢, 4 to 7 s |
| Answers are | the most detailed, using your figures most | the shortest, easiest to hear while driving | practical tips, the lowest cost | quick and direct, with your figures | short, but slower (once 16 s); twice said it lacked a figure |
Of 40 test questions, 34 went to the AI (4 of them with a web search); the other 6 get the app's own answer or Help. The same 34 questions and vehicle figures for all five (Muse Spark: 33, one was asked before Meta's billing was set up; October 2026, the quick model each service offers: Claude Haiku 4.5, GPT-5.4 mini, Gemini 3.8 Flash, Grok 4.20 non-reasoning; for Muse Spark its newest standard model, Muse Spark 1.3): driving, charging, costs, battery, towing, general knowledge and news. The figures came from replays of the developer's drives on the Android Automotive emulator. Times depend on the connection. Claude runs up to 3 searches a question; Gemini 3 includes 5,000 free searches a month, then $14 per 1,000 (Google's price, October 2026); Grok's searches cost $5 per 1,000 (often several a question) and Muse Spark's $2.50 per 1,000 (xAI's and Meta's prices, October 2026). Muse Spark comes from Meta's developer service, a preview Meta opened to developers in the US in July 2026; the app uses only Meta's standard models, which Meta says it doesn't train on.
Made for the Vehicle, Not the Phone
On the big screen
It installs from the vehicle's own Play Store and runs on the center screen, in portrait (Sierra EV) and landscape (Silverado EV).
Built for driving
Large numbers and touch targets, a Drive screen made for glancing, and every rule the vehicle sets while moving respected one by one.
Explained everywhere
Charts you can touch, an ⓘ on every figure that says in plain words what it means and where it comes from, and Help for every screen.
Everything Your Battery Is Doing, and What It Means for You
Live energy
Battery power in and out as it happens, efficiency over the last ¼, 1 and 5 miles, regen, climate and accessory use, and where each drive's energy went.
A range that learns your vehicle
One way, round trip and to empty, with your reserve. The energy model learns from all your drives at once: speed, hills, temperature, climate and load.
Road reach on the map: how far you can really drive along the roads, there and back, across state lines, worked out on the vehicle itself from road maps it downloads by itself. Nothing is sent, and it works without a connection. HERE stays for route checks with live traffic.
A Drive screen made for glancing
Big numbers for power, efficiency and how far you can still go, updating as you drive. When you leave Park on Home, the Drive layout takes over by itself.
Trips and road trips
Every drive and charge recorded automatically, with routes colored by efficiency, charge curves, a logbook and records.
Road trips found by themselves (a night away, or 100+ miles in a day): day by day with every charge, cost, climbing and weather. Share one by QR code; the trip lives only inside the link, and you choose what to hide.
Charging and costs
Find Charging with the chargers that fit your vehicle, Adapters You Carry, trip plans with charging stops, and reminders on the way. While you charge: the time to your limit, learned from your own charges, and a note when it gets there.
Charging costs from your home rate plan (peak hours included) and what you paid on the road; a monthly budget and a report card against a comparable gas vehicle.
Insights, your roads, and more on the screen
Where your energy went over the last 30 days (driving, speed, hills, climate and standby) and your fast-charge sweet spot. With your state's road map on the vehicle, the app also measures how often lights stop you, how long you wait and how fast you really drive on each kind of road (Energy > Lab).
Weather and radar, Next Up from your calendar, media controls, Ask Your Vehicle by voice (and your own AI), EV Radio briefings, and Diagnostics that show what the vehicle shares. Backups in your own Google Drive, and your data as spreadsheet tables.
Measured, Not Promised
Every number below was measured on real drives of the developer's 2024 GMC Sierra EV Denali Edition 1 (18 drives of 3 miles or more, October 1-5, from the vehicle's own recordings). One vehicle so far; highway and mountain drives are still to come.
| What was measured | EV Control Center | GM's own range readout |
|---|---|---|
| Typical miss per drive (median) | 3.9% (each drive's energy, predicted before the drive) | 6.5% (range used vs. miles driven); 29% to 53% on six of the 18 drives |
| Over all the drives together | +0.9% over 19 drives (worked out on a PC from the same recordings) | counted 11% fewer miles than were driven |
| Road figures on drives they hadn't learned | road reach map: a median 7.4% (its road figures learned on 9 drives, tested on 9 others; the energy model had learned all 18) | (not applicable) |
Accuracy by Kind of Drive
Energy > Lab now sorts your drives into local, highway (by road type, from your state's road map) and climbs (1,000 ft or more of climbing), and shows the app's typical miss next to GM's own range readout, on the same drives. Every owner sees it for their own vehicle. The developer's highway and mountain figures will be published here, measured the same way.
Proof, not promises
It shows its own accuracy in the app (Energy > Lab) on your drives, next to GM's own range readout.
Road reach on the vehicle
In the 2.9.0 test on the developer's Sierra EV, the whole road reach for Arizona alone took 0.48 s the first time and 0.39 s after, with no online service. Since 3.3 the map does this by itself, across state lines; the times for joined states are still to be measured on a vehicle.
Learns your roads
Lights, waits, real speeds and stop-and-go are measured from your drives, not assumed.
Private by design
Read-only. No ads, analytics or accounts. Trips and history stay on the vehicle; shared trips live only inside the link.
Made for the big screen
Native on the vehicle, in both screen shapes, with driving rules respected flag by flag.
Help built in
Every screen explained with real pictures and numbered spots, read aloud on request, and one tap from the screen you're on.
Where It's Going
Built in the open with the testers. What's next comes from what they report from their own vehicles.
- Now: 3.4AI answers from Grok (xAI) and Muse Spark (Meta) too, with your own key, next to Claude, ChatGPT and Gemini; like the others they search the web for news and other current questions. Questions that aren't about your vehicle go straight to your AI. 3.4.1: EV Control never plays, pauses or switches your media by itself, only when you tap its media buttons. 3.4.2: typing your name on the first start no longer jumps, Parking Mode after a drive, and Help opens faster. 3.4.3: the map on Drive gets zoom, heading or north up, and its own layers; Energy > Now shows how far the battery goes at this pace.
- 3.3Road reach worked out on the vehicle itself, across state lines, from road maps that download by themselves (every state within about 400 mi of home and 150 mi of where the vehicle is); your position isn't sent for it. 3.3.1: This Drive's efficiency follows the recorded drive, whose energy matched the battery's own reading within 0.4% over 212 mi of the developer's drives; the map colors your drive's track as you go; and "What's new in the app?" is answered by voice, also while driving. 3.3.2: feedback includes the last media events. 3.3.3: with Keep Driving, the stop counts as parked time, so a stop with the climate on no longer lowers the drive's efficiency; the drive shows it apart.
- 3.2AI answers: questions the app doesn't know go to your own Claude, ChatGPT or Gemini, with your vehicle's figures, read aloud. 3.2.1: add your key from your phone through Google Drive. 3.2.2: ask anything (news with a web search), and Search for an address on the map. 3.2.3: Keep Driving, so a stop at a gas station or for a coffee doesn't have to end your drive.
- 3.1Accuracy by kind of drive: local, highway and climbs, with GM's own figure side by side, in Energy > Lab.
- 3.0Help: a visual guide with real pictures of every screen; tap a number to learn what it does, or open that screen. Read aloud, searchable, and a 1-minute tour.
- 2.10Road trips with private QR sharing; road maps for all 48 contiguous states and DC.
- NextHighway and mountain accuracy from the developer's Sierra EV, published here, measured the same way as in the app.
- 4.0More languages: the app in languages other than English.
- LaterA phone and tablet companion app (iPhone and Android) to dig into every trip and charge, reading the backup in your own Google Drive.
Your Vehicle, Your Data
Read-only
The app only reads what the vehicle shares. It never changes a setting and can't control the vehicle.
Stays on the vehicle
Trips and history stay on the vehicle unless you choose to send them: a file, your own PC, or backups in your own Google Drive. Features that need a position send it only to do their job: the weather (rounded), HERE when you turn it on, map tiles and chargers for the area shown. The privacy policy lists each.
Nothing to sign up for in the app
No ads, no analytics, no accounts of its own. Read the privacy policy.
Join the Beta
For GM electric vehicles with Google built-in: tested on the GMC Sierra EV and laid out for the Chevrolet Silverado EV. The beta is free and installs from your vehicle's own Play Store.
- Fill in the short sign-up form with the Google account you use on your vehicle: ev-control-center.web.app/signup.
- Once you've been added (usually within a few days), open ev-control-center.web.app/tester on a phone or computer signed in to that same Google account, and accept the invitation to test.
- In the vehicle, open the Play Store, search for com.amueller.evcontrol and tap Install. It can take a few hours after step 2 to show up.
The form asks you to sign in with Google so you're added with the right account. Your email is used only for the testers' list and update emails. The tester link works once you've been added.
Questions
Which vehicles does it work on?
GM Ultium electric vehicles with Google built-in. It's developed on a GMC Sierra EV and laid out for the Chevrolet Silverado EV's wide screen.
Does it change anything on my vehicle?
No. It only reads what the vehicle shares with apps and never changes a setting.
Where does my data go?
Trips and history stay on the vehicle unless you send them: backups go to your own Google Drive only if you turn them on, and a shared road trip lives only inside its link. Features that need a position send it only to do their job: the weather (rounded), HERE when you turn it on, map tiles and chargers for the area shown; the privacy policy lists each. With AI answers on (your own key), your question, the vehicle's figures, a summary of your recorded driving and charging, and the app's version with the notes of its latest three releases go to the AI service you chose, never where you are.
How do updates work?
The testers' group gets an email for each new version, and the app shows what's new the first time you open it. Use Update in the Play Store; don't uninstall, that erases your recorded trips.
Who makes it?
An independent developer and Sierra EV owner. It is not made or endorsed by General Motors. Questions: akmueller32@gmail.com.