AI-Powered for Tesla

Every drive,
decoded by AI

Routes painted by speed.
Efficiency made visible.
AI tells you what to do next.

Download on the App Store See features

Available globally on the App Store. The app UI is currently Japanese; an English UI is in active development. Maps, charts, and route visualization are visual-first and usable today.

Home Destination Low (under 25 mph) Mid (25 - 40 mph) High (40+ mph)
Efficiency
228 Wh/mi
-8% vs last trip
AI Score
92
Excellent regen
braking usage
Battery
78%
Range 194 mi
180+
Owners
X25519
Encrypted
AI
Analysis
Features

Turn every drive into data

Live driving data from Tesla Fleet Telemetry, captured, visualized, and analyzed in real time.

Routes color-coded by speed

Your route is drawn on Apple Maps in real time, color-coded by speed band. The rhythm of your drive becomes obvious at a glance.

Live telemetry

Battery, speed, cabin and outside temperature. Every signal from your Tesla, streamed straight to your dashboard.

Efficiency in numbers

Wh/mi tracked automatically. Per-trip and daily trends turn improvements into something you can actually measure.

Automatic trip detection

Trips start and end on their own. Your full driving history piles up as a record you can revisit anytime.

Trip-complete notifications

The moment a trip ends, a push lands on your phone with distance, efficiency, and duration.

AI Analysis Pro

Every mile makes the AI smarter

AI parses your driving data and surfaces Tesla-specific ways to improve efficiency. The more you drive, the sharper it gets.

AI Analysis
March driving report
Regen braking usage at 85% — excellent. One-pedal driving is paying off in city traffic.
Average 228 Wh/mi — an 8% gain over last month. Roughly +16 miles of range.
Analysis
Dropping highway cruise from 65 to 60 mph alone should cut consumption by another ~8%. Hard-acceleration events are also down 12% versus last month, so an efficient driving pattern is settling in.
Outlook
Preconditioning 10 minutes before departure boosts cold-weather battery efficiency by 15-20%. Expect a slight rise in consumption next month as warmer temperatures push HVAC load up.
1

Driving Score

Regen usage, speed patterns, and acceleration scored as one number — with concrete things to fix every drive.

2

Monthly AI Report

A month of driving distilled by AI. Highlights, weak spots, and what to try next — generated automatically.

3

Route Efficiency Comparison

Compare different routes to the same destination by Wh/mi. AI pinpoints the most efficient way to drive it.

Security

Your data belongs to you

Data on our servers can only be decrypted on your iPhone. Privacy is enforced at the architecture level, not as a promise.

Device-key encryption (X25519)

Driving data is encrypted with your public key before it touches our servers. Only your device holds the key to decrypt it.

VIN hashed for anonymity

Your VIN is hashed with SHA-256. No plaintext vehicle identifier ever sits on our servers.

Official Tesla OAuth

Sign in safely through Tesla's official OAuth. We never see, store, or handle your password.

Strict tenant isolation

Each user's storage is fully isolated. Other users' data is physically out of reach.

Pricing

No reason not to start

The core experience is free. When you're ready to unlock the AI, upgrade to Pro.

Free
$0

 

Record, visualize, and review every drive. Start here.

  • Real-time dashboard
  • Route mapping
  • Trip history & monthly trends
  • Phantom drain detection
  • Widgets & push notifications
  • AI driving analysis & reports
Start free
Pro
$2.99 / month

Annual plan: $29.99 / year (save 2 months)

AI analyzes your driving and shows you how to do better. Worth more than a month of charging.

  • Everything in Free
  • AI Driving Score
  • Monthly AI Report
  • Route efficiency comparison
  • Battery degradation forecast
  • Data export (CSV)
Start with Pro
Comparison

How VoltKeep stacks up

A side-by-side look at the two common types of Tesla data loggers from a daily-driver perspective. If you care about zero setup, native iOS, AI insights, and privacy — VoltKeep is built for you.

Category VoltKeep Web service (SaaS) Self-hosted
Form factor Native iOS app Web service (SaaS) Self-hosted (Docker)
Initial setup Install from the App Store, sign in with Tesla OAuth — done in minutes Account signup + token configuration Stand up a VPS or NAS, configure Docker, Postgres, and Grafana
Native iOS experience Yes — Apple Maps, widgets, push, Shortcuts Browser only Browser (Grafana dashboards)
Data source Tesla Fleet Telemetry (official) Tesla Owner API polling Tesla Owner API polling
Efficiency view Apple Maps with speed-based color coding, Wh/mi tracked automatically Lists and charts Grafana dashboards
AI driving analysis Driving score, monthly AI report, efficiency recommendations None None
Battery degradation forecast Yes (Pro) Degradation tracking Degradation tracking
Phantom drain detection Auto-detected with alerts Manual review Manual review
Data storage X25519 encrypted (decrypted only on your device) Plaintext on the vendor's servers Your own server
Pricing Free; Pro $2.99/mo or $29.99/yr ~$5/month Free (you pay for the server)
Best for Tesla owners who want a native app and AI doing the efficiency work Owners happy with a browser-only, cloud-only workflow Tinkerers who want to run their own server and own every byte

The other products in this table are excellent in their own right. VoltKeep respects them and simply takes a different angle — native iOS, AI analysis, and privacy by design. Background on the move to Tesla Fleet Telemetry is in our deep dive.

FAQ

Frequently asked questions

Every model that supports Tesla Fleet Telemetry: Model 3, Model Y, Model S, and Model X.
Driving data on our servers is encrypted with X25519 public-key cryptography and can only be decrypted on your iPhone. No plaintext VIN or user identifier is stored server-side.
Yes. Recording and reviewing driving data, trip history, battery monitoring, and phantom drain detection are all free. Upgrade to Pro when you want the AI analysis layer on top.
AI analyzes your driving data across efficiency, regen braking usage, and speed patterns, then returns Tesla-specific recommendations like better one-pedal driving and smart preconditioning.
Yes. Cancel anytime through the App Store. Pro features stay active until the end of your billing period.
Data flows in through Tesla Fleet Telemetry, so background power usage on your iPhone stays minimal.
The AI driving score studies your patterns and delivers concrete fixes after every drive — better regen usage, optimized cruising speed — that translate into longer range.
Pro's battery degradation forecast surfaces battery health and how it's trending over time.
Yes. Battery loss while parked is detected automatically, and abnormal phantom drain triggers an alert. Sentry Mode consumption is tracked too, which makes pinpointing the cause much easier.
VoltKeep is a native iOS app with no server to stand up. Compared to web services, it adds an AI driving score and real efficiency recommendations. And driving data is X25519-encrypted, decryptable only on your device.

Better data. Better drives.

200+ Tesla owners are letting VoltKeep handle their efficiency, battery, and driving log — with AI in the loop.

Download on the App Store

What is VoltKeep — Tesla efficiency and driving analytics

VoltKeep is an iOS app built specifically for Tesla owners — Model 3, Model Y, Model S, and Model X. It pulls live data from Tesla Fleet Telemetry, paints your route on Apple Maps in real time, and color-codes it by speed band so you can see at a glance which segments are eating into your efficiency. If you've been weighing alternatives to other Tesla data loggers, VoltKeep was designed around the combination most owners actually want: a native iOS app, AI-driven insights, and a privacy model you don't have to take on faith.

The AI driving score studies your patterns — regen braking usage, cruising speed, hard acceleration, one-pedal driving — and returns Tesla-specific recommendations after every trip to push your efficiency higher. The monthly AI report rolls up your range trend, average Wh/mi, and driving habits, then highlights what to focus on next month. The battery degradation forecast lets you see how your pack is holding up over time, based on your own driving data.

Phantom drain — the slow battery loss that happens while your Tesla sits parked — is detected automatically, with push alerts when something looks abnormal. Sentry Mode, preconditioning, and HVAC consumption are all tracked too. Route efficiency comparison takes the multiple ways you can drive to a destination and ranks them by Wh/mi, with AI calling out the most efficient option.

No browser-only SaaS dashboards, no Docker stack to maintain. Install from the App Store, sign in with official Tesla OAuth, and you're recording in seconds. Driving data is protected with X25519 public-key encryption — decryption happens only on your iPhone — and your VIN is hashed with SHA-256 so no plaintext vehicle identifier ever sits on our servers. Whether you want more range, better efficiency, or just a clear picture of your battery's health, VoltKeep is the AI built for what Tesla owners actually ask.