Comparison

Cumulus vs Graf IoT

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

Head to head
About

Cumulus

Features
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Mit der App werden die Messwerte von THIES Clima Wetterstationen angezeigt und verwaltet. Die App ermâglicht den Zugriff auf aktuelle und gespeicherte Messwerte. Über die Gruppenverwaltung ist es mâglich eigene, private Netzwerke zu erstellen und zu verwalten.

About

Graf IoT

Features
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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 β€’ Fill level and remaining volume in litres and percent β€’ Alerts for critical fill levels β€’ Weather forecast for the location of your system β€’ Level height and device status for every system β€’ All devices on one central dashboard β€’ Device data, assignment and location at a glance β€’ 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

Cumulus1 screens
Graf IoT4 screens

Verdict

The call

The clearest difference is in-app purchases: Graf IoT at none against Cumulus's 6. Graf IoT also leads on update cadence (monthly vs every 2 months). Cumulus's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Cumulus sells 6 one-off in-app purchases. Graf IoT asks for nothing beyond the download.

UpkeepUpdate frequency

Cumulus ships an update every 2 months, Graf IoT monthly. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

Scorecard3 real differences Β· 3 level
Cumulus versus Graf IoT: the parameters behind the verdict, then further details
ParameterCumulusGraf IoT
PriceFreeFree
Update frequencyEvery 2 monthsMonthly β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS15.0 β€” better16.0
Further details β€” not scored
Size180 MB47 MB
Age rating4+4+
DeveloperAdolf Thies GMBH & CO. KGOtto Graf GmbH Kunststofferzeugnisse

In-app purchases

6 purchases

Cumulus

One-time6
  • 12 months archiving period$8.99
  • 24 months archiving period$15.99
  • 1 year event handling$84.99
Show 3 more
  • Buy 10 users$139.99
  • Buy 20 users$179.99
  • Buy 50 users$299.99
None

Graf IoT

No in-app purchases

Questions

Is Cumulus free?
Cumulus is free to download, with in-app purchases available.
Is Graf IoT free?
Graf IoT is free to download, with no in-app purchases.
Do Cumulus or Graf IoT have ads?
Neither Cumulus nor Graf IoT shows ads.
Which is updated more often, Cumulus or Graf IoT?
Cumulus ships an update every 2 months, and Graf IoT monthly. Most recently, Cumulus was updated on October 3, 2026 and Graf IoT on October 9, 2026.

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