ULT vs Lüftungstool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ULT
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This app can be used to perform important air extraction calculations quickly and easily.
Lüftungstool
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Diverse Berechnungstool für Lüftungskanäle und Lüftungsrohre. Eingabemöglichkeiten und Funktionen siehe Screenshots. Eingabe-/ Auswahlmöglichkeiten: • Lüftungsrohr von 80 bis 1250 mm • v von 0,5 bis 20 m/s • ϑ von 0 bis 60 °C • φ von 1 bis 100 %
Screenshots
Verdict
The clearest difference is price: ULT at Free against Lüftungstool's $2.99. ULT also leads on iOS requirement (13.0 vs 15.2). Lüftungstool's advantage is update cadence (every 3 weeks vs every 14 months). On ads, in-app purchases and device support 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
ULT is free to download; Lüftungstool costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ULT ships an update every 14 months, Lüftungstool every 3 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.
| Parameter | ULT | Lüftungstool |
|---|---|---|
| Price | Free — better | $2.99 |
| Update frequency | Every 14 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 11 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Jakschik | Burak Doelek |
In-app purchases
ULT
No in-app purchases
Lüftungstool
No in-app purchases
