How is VoltKeep different from other Tesla data loggers?
VoltKeep connects directly to the Tesla Fleet API, so unlike TeslaMate or its iOS frontends (HedgieMate / Mytess), no server hosting is required. Distinguishing features: native iOS app, X25519 public-key encryption, built-in AI analysis, free plan available. Compared to TeslaMate (open-source self-hosted, monthly VPS cost) and TeslaFi (cloud-based, English only, $5/month), VoltKeep is fully self-contained on iPhone. If you need Apple Watch, HedgieMate is an option; if you specifically want a TeslaMate frontend, Mytess is an option.
The Tesla data logger landscape
Services that record and analyze Tesla vehicle data fall into four categories:
- Self-hosted open source — TeslaMate (Docker setup, free, requires technical knowledge)
- Frontend apps for self-hosted backends — HedgieMate / Mytess (iOS, require a separate TeslaMate server)
- Cloud services — TeslaFi (English, monthly subscription, no self-hosting)
- iOS native + direct Tesla connection — VoltKeep (no server, free plan, AI analysis)
Side-by-side comparison
| TeslaMate | HedgieMate | Mytess | TeslaFi | VoltKeep | |
|---|---|---|---|---|---|
| Type | Self-hosted OSS | iOS + TeslaMate | iOS + TeslaMate | Cloud | iOS + Tesla direct |
| Server hosting | Required | Required | Required | Not required | Not required |
| Monthly cost | VPS fees | VPS + $9.99 one-time | VPS + $9.9 one-time | $5 | Free or $2.99 |
| Languages | Partial | EN/KR/CN | JP focus | EN | JP today (EN in development) |
| Platform | Web browser | iOS / Mac / Watch | iOS 18+ | Web / iOS | iOS 17+ |
| AI analysis | — | — | — | — | Yes (Pro) |
| Data encryption | Self-managed | Self-managed | Self-managed | Operator-held | X25519 + hashed VIN |
| Phantom drain detection | Manual | Timeline view | Park history | Yes | Auto-detect + push |
What sets VoltKeep apart
1. No server required + direct Tesla official API connection
VoltKeep connects directly to Tesla's official Fleet Telemetry API. There's no need to run Docker / PostgreSQL / Grafana like TeslaMate, and no TeslaMate backend prerequisite like HedgieMate / Mytess. Install the app on your iPhone and sign in with your Tesla account — that's it.
2. Native iOS, available worldwide on the App Store
VoltKeep is distributed globally on the App Store — anyone can install it from the US, EU, UK, or Japan. The app currently ships with a Japanese-only UI; an English UI is in active development. Many of the screens (maps, charts, route visualization) are visual-first and usable today regardless of language; written copy will be English in an upcoming release.
3. X25519 public-key encryption + hashed VINs
Cloud services like TeslaFi store and can read your data on the server side. VoltKeep adopts an architecture where even our servers cannot decrypt your data (details in the data encryption FAQ).
4. Built-in AI analysis
While other data loggers stop at "graphing", VoltKeep uses a large language model to generate personalized improvement suggestions based on your real driving data (details in the AI driving score FAQ). AI output is currently in Japanese; multi-language output is on the roadmap.
Which service fits which user?
- TeslaMate — engineers comfortable with Docker who want full customization
- HedgieMate — already running TeslaMate, want Apple Watch glances
- Mytess — already running TeslaMate, want a Japanese-language frontend
- TeslaFi — happy with English, prefer a cloud service over a VPS, want US-ecosystem integration
- VoltKeep — Tesla owners who want no server, native iOS app, AI analysis, and privacy-first encryption (UI is Japanese today; English in development)
For a deeper comparison: TeslaMate Alternatives on iOS — HedgieMate vs Mytess vs VoltKeep
Track your Tesla — no server, native iOS, AI-powered.
Start on the free plan; upgrade to Pro for $2.99/month when you need it.
Get it on the App Store