4WD Control vs Graf IoT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4WD Control
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4WD Control von DSA-electronic Mit der 4WD Control App haben Sie vollen Zugriff auf Ihre Haldex Control Unit Blue und können die Einstellungen für den Allradantrieb selbst vornehmen und auf dem Controller speichern. Durch die Live-Übertragung der Daten kann jederzeit das aktuelle Sperrlevel der Allradkupplung beobachtet werden. Zusätzlich bietet die App die Möglichkeit einige interessante Messwerte des Motors und des Fahrzeugs einzusehen. 4WD Control Highlights: - volle Kontrolle über Ihren Allradantrieb - visuelle Darstellung interessanter Motor- und Fahrzeugparameter, wie z.B. Motordrehmoment in Nm, Ladedruck, versch. Temperaturen, Bordspannung, DPF-Regeneration, ... (abhängig vom Fahrzeugmodell) Voraussetzung zur Nutzung der App ist eine Haldex Control Unit Blue. Die Control Unit ist für eine Vielzahl von Modellen aus dem VW-Konzern erhältlich. Besuchen Sie uns auf unserer Website www.dsa-electronic.de
Graf IoT
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GRAF IoT shows you how much water is in your system at any time and alerts you before it gets critical. The app connects to your GRAF BlueLevel and GRAF ARCOS devices and brings level, volume and system status together on one dashboard. You get a notification when the level runs too low or too high. The built-in weather forecast shows you the rainfall heading for your site. FEATURES • Fill level and remaining volume in litres and percent • Alerts for critical fill levels • Weather forecast for the location of your system • Level height and device status for every system • All devices on one central dashboard • Device data, assignment and location at a glance • Light and dark mode For cisterns and rainwater systems with GRAF BlueLevel and for retention and infiltration systems with GRAF ARCOS. A connected GRAF device is required to use the app.
Screenshots
Verdict
The clearest difference is update cadence: Graf IoT at monthly against 4WD Control's every 7 months. 4WD Control's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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.
4WD Control ships an update every 7 months, Graf IoT monthly. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.
| Parameter | 4WD Control | Graf IoT |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 40 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Schmidtner | Otto Graf GmbH Kunststofferzeugnisse |
In-app purchases
4WD Control
No in-app purchases
Graf IoT
No in-app purchases









