Key for Tesla vs DuoLens
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
DuoLens
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DuoLens — Capture the world and don't forget to capture yourself. Activate both front and back cameras simultaneously and record two videos at once. Whether it's family moments, travel memories, or everyday sharing — you and the scene are always in frame together. 【Key Features】 · Dual Recording — Capture front and back cameras simultaneously in one take, with synced audio · Flexible Display — Drag the floating window freely, swap views with one tap, or switch to split-screen mode · High Quality — Record from 720p to 4K, with 30fps and 60fps options · Audio Options — Choose stereo or mono recording to suit your needs · Zoom Control — Pinch to zoom while recording, easily adjust the rear camera view · Dual Playback — Play both videos in sync with progress control and mute options · Album Management — Browse all recordings, batch select and delete, replay with one tap · Video & Photo — Not just dual video recording — capture dual-view photos too 【Perfect For】 · Family Time — Capture your child's smile and your own reaction at the same time · Travel — The landmark and your expression, all in one frame · Daily Sharing — No more choosing between selfie and scenery — get both · Special Moments — Birthdays, parties, graduations — you're both in the picture 【Privacy & Terms】 Your privacy is strictly protected. All video editing is done locally and will not be shared. For more details, visit: Apple Standard License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service & Privacy Policy: https://app.kanchuan.com/en/duolens/policy 【Contact】 Wechat:ckanchuan Website:https://app.kanchuan.com/en/duolens
Screenshots
Verdict
The clearest difference is price: DuoLens at Free against Key for Tesla's $1.99. DuoLens also leads on update cadence (every 10 days vs every 5 weeks). Key for Tesla's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.4). On in-app purchases and device support 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
DuoLens 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, DuoLens every 10 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Key for Tesla | DuoLens |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 2.9 (14 ratings) — better | — |
| Positive reviews | 55.0% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 5 weeks | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.4 |
| Further details — not scored | ||
| Size | 10 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Joao Nunes | 明伟 陈 |
In-app purchases
Key for Tesla
No in-app purchases
DuoLens
No in-app purchases









