Comparison

ULT vs BrennerCalc

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

Head to head

Calculations & service visits

Free

🔧 Utilities

No ratingsView app →

About

ULT

Features

Read full description

This app can be used to perform important air extraction calculations quickly and easily.

About

BrennerCalc

Features

Read full description

BrennerCalc brings together calculation aids for heating and HVAC service. Use the existing burner, nozzle, gas and heating-water calculators and document the inputs behind your work. INSTALLATIONS AND SERVICE VISITS Name installations and capture dated visits as fixed calculation snapshots. Record input sources and visit notes. Reopen saved results without changing them when you make new calculations. BEFORE-AND-AFTER COMPARISON Compare compatible visits of the same calculation type. Share a service record with inputs, sources, notes, results and clear differences. German and English. Local calculations and service records work offline. The oil-burner calculators are free. BrennerCalc Pro permanently unlocks the gas and heating-water calculators with a one-time in-app purchase. Existing Pro unlocks remain available. Professional calculation aid: manufacturer data, applicable rules, system design and actual measurements take precedence. Check results against the real installation. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ULT3 screens

BrennerCalc4 screens

Verdict

The call

The clearest difference is in-app purchases: ULT at none against BrennerCalc's 1. ULT also leads on iOS requirement (13.0 vs 17.0). BrennerCalc's advantage is update cadence (every 2 months vs every 14 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BrennerCalc sells 1 one-off in-app purchase. ULT asks for nothing beyond the download.

UpkeepUpdate frequency

ULT ships an update every 14 months, BrennerCalc every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 3 level

ULT versus BrennerCalc: the parameters behind the verdict, then further details
Parameter	ULT	BrennerCalc
Price	Free	Free
Update frequency	Every 14 months	Every 2 months — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	13.0 — better	17.0
Further details — not scored
Size	11 MB	1 MB
Age rating	4+	4+
Developer	Stefan Jakschik	Piotr Kaminski

In-app purchases

None

ULT

No in-app purchases

1 purchases

BrennerCalc

One-time1

BrennerCalc Pro$3.99

Questions

Is ULT free?

ULT is free to download, with no in-app purchases.

Is BrennerCalc free?

BrennerCalc is free to download, with in-app purchases available.

Do ULT or BrennerCalc have ads?

Neither ULT nor BrennerCalc shows ads.

Which is updated more often, ULT or BrennerCalc?

ULT ships an update every 14 months, and BrennerCalc every 2 months. Most recently, ULT was updated on October 27, 2026 and BrennerCalc on October 24, 2026.