Comparison

i vs Wavekey

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

Head to head
About

i

Manage your vehicle registration documents digitally and securely. View, update, and share your registration certificate from your device, reducing paperwork and providing easy access to important vehicle data.

Highlights
  • Digital vehicle registration document (DFZ)
  • Add DFZ via eID or QR code
  • Automatic updates and inspection reminders
  • Share registration documents securely
  • View vehicle data offline
  • Delete DFZ and shared versions
Read full description

The digital vehicle registration document (DFZ) is a digital version of the vehicle registration certificate that can be used in the i-Kfz app on your device. With the i-Kfz app, vehicle owners can view, update and, if necessary, share their vehicle registration document (Zulassungsbescheinigung Teil I (ZB I)) anytime, anywhere. This facilitates access to important vehicle data and reduces the amount of paperwork required. The app also offers a secure and user-friendly way to manage vehicle registration certificates digitally. App functions: ADD: Vehicle owners can have a DFZ issued either using the eID function or by scanning a QR code in the app. There are several options for obtaining a QR code: QR codes are provided both on site, during the registration process or on request, as well as when registering online. UPDATE: The validity and current status of the digital vehicle registration document are automatically checked when the app is opened. The i-Kfz app also offers automatic updates, such as reminders of upcoming periodic technical inspections. SHARE: With just a few clicks, the vehicle owner can generate any number of shared versions of a DFZ and share them with third parties via link or QR code for permanent or temporary use. VIEW: With the help of a user-friendly display, you can view your vehicle and owner data at any time, even without an internet connection, and present it during a traffic check or periodic technical inspections, for example. DELETE: You can delete the DFZ and its shared versions in the app yourself. The i-Kfz app is constantly being developed. We welcome feedback in the store or in the app. If you have any questions or suggestions, our support team will be happy to assist you: i-Kfz@support.bdr.de Privacy policy: http://www.kba.de/app-dse_en Accessibility statement: http://www.kba.de/app-bfe-ios_en End User Licence Agreement (EULA): http://www.kba.de/app-eula_en

About

Wavekey

Read full description

Your identity, verified by sound. Your phone emits an inaudible ultrasonic code that your device recognizes, verifying your identity instantly. No passwords. No SMS. No QR codes. Why Wavekey: Authenticate with sound - hold your phone near your laptop or screen, and you’re verified in seconds. Private & Secure - no personal data ever leaves your device; every signal is encrypted and ephemeral. Instant & effortless - no scanning, typing, or waiting for codes. Works anywhere - no Bluetooth, Wi-Fi, or pairing required. How it Works Open Wavekey on your iPhone. Tap Emit to send a one-time sonic OTP. Your nearby device authenticates automatically - no interaction needed. Privacy by Design Wavekey never records audio or collects personal data. Your keys stay securely stored on your device. Always.

Screenshots

i4 screens
Wavekey3 screens

Verdict

The call

The clearest difference is update cadence: Wavekey at every 2 months against i's every 4 months. Wavekey also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

i ships an update every 4 months, Wavekey every 2 months. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 7 level
i versus Wavekey: the parameters behind the verdict, then further details
ParameteriWavekey
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size67 MB4 MB
Age rating4+4+
DeveloperKraftfahrt-BundesamtEverLink

In-app purchases

None

i

No in-app purchases

None

Wavekey

No in-app purchases

Questions

Is i free?
i is free to download, with no in-app purchases.
Is Wavekey free?
Wavekey is free to download, with no in-app purchases.
Do i or Wavekey have ads?
Neither i nor Wavekey shows ads.
Which is updated more often, i or Wavekey?
i ships an update every 4 months, and Wavekey every 2 months. Most recently, i was updated on October 25, 2026 and Wavekey on October 14, 2026.

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