Key for Tesla vs EMX RFID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Key for Tesla
Control your Tesla vehicle directly from your Apple Watch or iPhone. Unlock, lock, start, and manage climate settings with a single tap or voice command. Monitor battery status and charging progress conveniently.
- Unlock and start Tesla with one tap
- Lock car with a tap
- Today extension for quick access
- Siri support for commands
- Apple Watch climate control
- Check battery status and charging
- Watch Complications for quick info
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Key for Tesla allows you to forget about your key and leave it at home. If you feel like you want to impress your friends try the Siri extension on the Apple Watch or iPhone! Note: Supported vehicles: pre 2021 S/X This app focus on Apple Watch functionality and Siri. Features on iPhone: 1) Unlock and start your Tesla with one tap using the Touch ID or Face ID 2) Lock the car just by tapping the lock button 3) A convenient Today extension. You can unlock and start your Tesla in less than 5 seconds 4) Siri support 5) Additional Siri Shortcuts for common commands 6) Login with password auto fill Features on Apple Watch: 1) Open and close the car 2) Start and Stop the climate 3) Check your battery status, range, charging power, added energy, added range and time remaining to complete charging 4) Watch Complication to check battery level (updates every 30 minutes and pauses between 00:00 and 08:00, can be configured in the iPhone app) 5) Watch Complication to Start and Stop the climate. 6) Watch Complication to Start and Stop max defrost. 7) Siri support 8) Additional Siri Shortcuts for common commands Siri commands: Lock my car Unlock my car Is my car locked? Additional Siri Shortcuts: Start and Stop Climate Start and Stop Max defrost Vent and Close roof Open and Close Rear Lift-gate with and without confirmation Open Frunk Open Charge Port Lock and Unlock without confirmation The original Tesla iPhone App takes you 2 taps and a loading to unlock and start. This app is just one tap away for the same functionality. Note: This app stores your authentication token and your password, if given, using iOS secure Keychain. The app uses Tesla's MFA authentication to create an access token. You will be redirected to Tesla's page to authenticate. The app never has access to your credentials. Supported devices: iPhone 5S or newer with Touch ID, iPhone X and newer with Face ID. Apple Watches 2 and above Supported vehicles: pre 2021 S/X model 3/Y and 2021+ S/X support are not supported but it might come in the future
EMX RFID
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Mobile app for use configuring EMX Industries, Inc. RFID readers.
Screenshots
Verdict
The clearest difference is price: EMX RFID at Free against Key for Tesla's $1.99. Key for Tesla's advantage is update cadence (every 5 weeks vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
EMX RFID is free to download; Key for Tesla costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Key for Tesla ships an update every 5 weeks, EMX RFID every 8 months. The most recent releases landed on September 16, 2026 and May 18, 2026 respectively.
| Parameter | Key for Tesla | EMX RFID |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.1 (13 ratings) — better | — |
| Positive reviews | 55.0% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 5 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.2 — better |
| Further details — not scored | ||
| Size | 10 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Joao Nunes | EMX Industries Inc |
In-app purchases
Key for Tesla
No in-app purchases
EMX RFID
No in-app purchases
