Comparison

i vs SecretVault

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

SecretVault

Features
Read full description

Want to share secret phrases like passwords with trusted people? This app can help you do just that. You can enter any text you want, it will be encrypted and can only be seen again once with the created link. Share secrets, without worrying that they may be seen by the wrong people. Benefits of using this service: - Secrets are ephemeral, links will only reveal them once and will also automatically expire if not accessed - Control over your secrets, invalidate any links before they are accessed, if you change your mind - Overview of your secrets, check if your secrets have already been accessed in the archive

Screenshots

i4 screens
SecretVault3 screens

Verdict

The call

i and SecretVault are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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, SecretVault every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
i versus SecretVault: the parameters behind the verdict, then further details
ParameteriSecretVault
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 — better
Requires iOS17.017.0
Further details — not scored
Size67 MB7 MB
Age rating4+4+
DeveloperKraftfahrt-BundesamtMuller & Wulff GmbH

In-app purchases

None

i

No in-app purchases

None

SecretVault

No in-app purchases

Questions

Is i free?
i is free to download, with no in-app purchases.
Is SecretVault free?
SecretVault is free to download, with no in-app purchases.
Do i or SecretVault have ads?
Neither i nor SecretVault shows ads.
Which is updated more often, i or SecretVault?
i ships an update every 4 months, and SecretVault every 2 months. Most recently, i was updated on November 4, 2026 and SecretVault on October 30, 2026.

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