OneFlash vs Volvé
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OneFlash
Find nearby stations to rent portable phone chargers. Scan a QR code to unlock a battery, charge your device, and return it to any station in the network. Share power with friends and contribute to a more sustainable future.
- Locate nearby charging stations
- Scan QR code to unlock battery
- Charge multiple devices
- Return battery to any station
- 100% recyclable batteries
- Flexible return policy
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How does OneFlash work? Locate the nearest OneFlash station. Scan the station's QR code to unlock a OneFlash portable battery. Grab the OneFlash battery and charge your smartphone! Performance Our 5000 mAh portable batteries can charge your phone from 20% to 100% in just one hour and can charge up to 3 smartphones. Mobility Return the OneFlash battery to any station in our network. Grab a battery in a café near Bastille metro and drop it off at a gym in République. Sharing Each OneFlash battery is equipped with 3 cables compatible with all smartphones. Charge up to 3 phones at once and share energy with your friends! Ecology OneFlash aims to reduce lithium overconsumption by offering a network of 100% recyclable rental portable batteries. We promote a sharing economy to reduce the purchase of personal external batteries. Proximity To make our rental and sharing system work for you, we've brought OneFlash to your favorite places, including shopping malls, gyms, airports, train stations, libraries, museums, and many more! Let us know where you'd like to see OneFlash stations! Accessibility We've made renting portable batteries convenient. That's why OneFlash is mostly free! To ensure availability for everyone, a €19 deposit is held but not charged. Plus, you have up to 4 days to return it. Additional Functionality At OneFlash, we think of everything. That's why we've added a micro USB port on each of our portable batteries. So, within the deposit period, you have the option to recharge the battery yourself. This gives you more flexibility and allows you to use the battery for as long as you need. Practical, right? What's New? We're always planning new features and regularly updating the app to provide you with the best OneFlash experience possible! We're Listening We're building OneFlash every day to enhance your experience. Your feedback matters! Send us your comments, suggestions, and recommendations at bonjour@oneflash.fr. P.S.: Don't forget to follow us on social media!
Volvé
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You can’t always predict what will happen. But you can be prepared. Volvé is your personal safety net. Before you go out, you set up a plan: location, contacts, and time. If you don’t confirm you’re safe, the app automatically sends an alert with all the information to your trusted network. Ideal for: • Dates • Trips • Meetings • Night travel • Any situation where you want extra backup How it works • Set up your plan in seconds • Volvé activates a silent countdown • When you return, you enter your safe code • If you don’t, an alert is sent automatically Key features Duress code If someone forces you to cancel, you can enter a special code that triggers the alert silently. Panic button Send an immediate alert with your real-time location. Trusted contacts Your contacts receive the information via message and email. -- Your safety doesn’t depend on the situation. It depends on being prepared. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: OneFlash at none against Volvé's 1. OneFlash also leads on iOS requirement (15.1 vs 17.0). Volvé's advantage is update cadence (daily vs every 2 weeks). On price, ads 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
Both are free to download. Volvé sells 1 in-app purchase, starting at $2.99 per month. OneFlash asks for nothing beyond the download.
OneFlash ships an update every 2 weeks, Volvé daily. The most recent releases landed on October 8, 2026 and September 20, 2026 respectively.
| Parameter | OneFlash | Volvé |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (22 ratings) — better | — |
| Positive reviews | 70.8% of reviews | — |
| Number of ratings | 22 — better | — |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | OneFlash | Diego Maidana |
Bugs and requests
OneFlash
Reported bugs
6 issues- App is glitchy and unresponsive
- Cannot change country for phone number
- Does not send SMS confirmation code
- Activation code not received via SMS
- System does not detect battery return
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- App proposes already reported damaged batteries
Requested features
3 requests- Allow email login option
- Improve detection of battery return
- Ensure cables are not damaged
Volvé
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OneFlash
No in-app purchases
Volvé
- Volve Premium EN$2.991 Month









