congstar vs i
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
congstar
Easily manage your mobile plan and track usage with this app. View data, SMS, and minutes, recharge prepaid credit, and manage your SIM or eSIM. Control your tariff and options, update personal details, and access bills.
- Track data, SMS, and minutes usage
- Manage tariff and options
- Recharge prepaid credit
- View bills
- Manage SIM and eSIM
- Update personal data
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Mit der kostenlosen congstar App hast du schnell und einfach volle Kontrolle über deine Verbräuche und deine Daten jederzeit im Blick. Die congstar App bietet dir folgende Funktionen: Für Prepaid & Vertrag - Verbrauch im Blick - Daten, SMS und Minuten einsehen (inkl. Widget für Datenverbrauch) - Tarif & Optionen verwalten - Tarif wechseln, Optionen buchen oder kündigen - Guthaben & Rechnungen - Prepaid-Guthaben aufladen oder Rechnungen als PDF einsehen - SIM & eSIM verwalten - SIM-Karte sperren/tauschen, eSIM aktivieren, PIN & PUK anzeigen - Persönliche Daten ändern - Adresse, Zahlungsdaten oder Legitimations-PIN anpassen Wir entwickeln unsere congstar App kontinuierlich weiter und freuen uns über deine Bewertungen und konstruktiven Hinweise. Die Erklärung zur Barrierefreiheit unserer App findest du unter: https://www.congstar.de/barrierefreiheit Viel Spaß mit unserer App wünscht dir Dein App Team
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.
- 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
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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
Screenshots
Verdict
The clearest difference is rating: i at 5.0 against congstar's 4.5. i also leads on review sentiment (100% vs 73%). congstar's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (275 vs 2). On price, ads, in-app purchases and monetization model 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.
i holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: congstar has 275 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of congstar's written reviews are positive against 100% of i's.
congstar ships an update fortnightly, i every 3 months. The most recent releases landed on September 26, 2026 and September 29, 2026 respectively.
| Parameter | congstar | i |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (275 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 72.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 275 — better | 2 |
| Update frequency | Fortnightly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 201 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | congstar GmbH | Kraftfahrt-Bundesamt |
Customer experience
congstar
i
In-app purchases
congstar
No in-app purchases
i
No in-app purchases
