Quantum Mobility vs Sumn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quantum Mobility
Reserve, unlock, and drive vehicles directly from your property using your phone. Book by the hour or day, find your car at a dedicated parking space, and return it when your trip is complete. Insurance is included with 24/7 availability.
- Reserve vehicles via phone
- Unlock and drive with your phone
- Hourly or daily bookings
- Dedicated onsite parking
- Insurance included
- 24/7 availability
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With Quantum’s carsharing platform, members can reserve, unlock, and drive vehicles directly from their property using only their phone. Book by the hour or day, find your car at a dedicated onsite parking space, and return it when your trip is complete. Available 24/7, with insurance included. How to get started: 1) Download the Quantum Mobility app 2) Enter your email to start new user registration 3) Complete registration, reserve and drive. Your phone is your key! ABOUT QUANTUM MOBILITY Driving the Future of Mobility, Quantum Mobility is a next-generation Mobility-as-a-Service (MaaS) platform redefining how people move. Our intelligent carsharing solution integrates seamlessly into residential communities, luxury hotels, and workplaces, delivering an exclusive, on-demand amenity. Vehicles are positioned on-site in dedicated parking spaces and can be reserved, unlocked, and driven instantly through the Quantum Mobility app. Experience the future of transportation - Carsharing as an Amenity.
Sumn
This electric car-sharing app connects you with vehicles in your community for on-demand use. Easily book, drive, and control your reserved EV, making car-free living convenient and affordable. Enjoy free charging and included insurance for a seamless experience.
- On-demand EV booking
- Digital car controls
- Free charging
- Included insurance
- Trip history
- Vehicle issue reporting
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Sumn is an electric car-sharing platform built for communities that enables you to easily book & drive an EV on-demand. Through the app, you can join your Sumn community, browse through available vehicles, reserve & go! Sumn makes it convenient, reliable, and affordable to live car-free. Charging is free and you're covered with insurance when you drive! With our app, you have full control of your Tesla during your reservation. You can even turn on the A/C before you get into your car! App Features: - Digital car controls - View trip history - Rate & leave trip feedback - Report vehicle issues - Live car-free! Getting started is easy: 1) Download the app 2) Sign up 3) Get approved as a driver 4) Join your community, unlock, & start driving!
Screenshots
Verdict
The clearest difference is rating: Quantum Mobility at 4.9 against Sumn's 4.3. Quantum Mobility also leads on update cadence (every 9 days vs every 3 weeks) and ratings volume (52 vs 12). On price, review sentiment, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Quantum Mobility holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 52 and 12 respectively. Written reviews complicate that: 92% of Quantum Mobility's written reviews are positive against 100% of Sumn's, so the app with the better star average is not the one people write more warmly about.
Quantum Mobility ships an update every 9 days, Sumn every 3 weeks. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.
| Parameter | Quantum Mobility | Sumn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (52 ratings) — better | 4.3 (12 ratings) |
| Positive reviews | 92.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 52 — better | 12 |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 87 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Quantum Mobility, LLC | SUMN, Inc. |
Customer experience
Quantum Mobility
Sumn
In-app purchases
Quantum Mobility
No in-app purchases
Sumn
No in-app purchases
