Comparison

KEI vs VoltStation

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

KEI

Features
Read full description

De KEI-week is de algemene introductieweek voor alle aankomende eerstejaars studenten in Groningen en vindt plaats van 11 t/m 15 augustus. De KEI-app verschaft informatie over alles wat je moet weten tijdens de KEI-week. Je kunt met de app onder andere foto's, video's, nieuws en het programma van de KEI-week en studentenorganisaties bekijken.

About

VoltStation

Features
Read full description

Never get stuck with a low battery when you need your phone. With VoltStation, you can rent a power bank in seconds from a location nearby. Open the app, find a station, scan the QR code, and take a power bank right away. Done charging? Simply return it later at a VoltStation location. VoltStation is built for the moments when your battery is running low and you want to stay connected. Whether you are in a restaurant, having drinks, studying, shopping, or just need a quick charge, VoltStation gives you a simple and practical solution whenever you need it. With the app, you can: find nearby VoltStation locations view available stations rent a power bank by scanning the QR code track your active rental and usage time see where you can return the power bank How it works: Open the app and find a nearby VoltStation location Scan the QR code at the station Take a power bank and charge your phone Return the power bank later at a VoltStation location VoltStation makes charging simple, fast, and accessible, right when you need it.

Screenshots

KEI3 screens
VoltStation4 screens

Verdict

The call

The clearest difference is update cadence: KEI at every 2 weeks against VoltStation's every 3 months. VoltStation's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

KEI ships an update every 2 weeks, VoltStation every 3 months. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

Scorecard2 real differences ยท 4 level
KEI versus VoltStation: the parameters behind the verdict, then further details
ParameterKEIVoltStation
PriceFreeFree
Update frequencyEvery 2 weeks โ€” betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.513.0 โ€” better
Further details โ€” not scored
Size13 MB58 MB
Age rating9+4+
DeveloperAppademic B.V.VoltStation B.V

In-app purchases

None

KEI

No in-app purchases

None

VoltStation

No in-app purchases

Questions

Is KEI free?
KEI is free to download, with no in-app purchases.
Is VoltStation free?
VoltStation is free to download, with no in-app purchases.
Do KEI or VoltStation have ads?
Neither KEI nor VoltStation shows ads.
Which is updated more often, KEI or VoltStation?
KEI ships an update every 2 weeks, and VoltStation every 3 months. Most recently, KEI was updated on October 13, 2026 and VoltStation on October 25, 2026.

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