Comparison

Reflex Pro App vs RadiatorOutput

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

Head to head
About

Reflex Pro App

Features
Read full description

Let your smart phone help you! You can now get answers to pressure maintenance queries in heating, solar power and hot water systems at the touch of a button โ€“ even in the darkest boiler room! The Reflex Pro App allows you to calculate in situ expansion vessels, define upstream and filling pressures, and take appropriate steps with respect to the hardness of water used to fill and top up systems in accordance with VDI 2035. Ideal for project surveys, initial consultations, and producing highly accurate calculations on site.

About

RadiatorOutput

Calculate radiator heat output based on water and air temperatures. Ensure optimal energy efficiency and cost savings by selecting the correct radiator size for any heating system, including those with low water temperatures. Supports metric units and can also calculate cooling output for convectors and fan-coils.

Highlights
  • Calculate radiator heat output
  • Adjust for water and air temperatures
  • Optimize energy efficiency
  • Supports low water temperature systems
  • Calculate cooling output
  • Metric units only
Features
Read full description

Quickly calculate a radiator's heat output at different water and air temperatures. Select the radiator that fits, based on heat losses and water temperature. Don't undersize or oversize and ensure the best energy efficiency possible.ย  Low water temperature (e.g. with heat pump as heat generator) can greatly increase energy efficiency and keep the cost down, but it still needs to provide enough heat to keep the room or the building warm. That's why larger radiators are needed in such cases. Find out exactly how large quickly using this app. Anywhere, anytime, fast and simple. ** Note: metric units only. *** This app is totally free - no ads, no in-app purchases. No account needed, no log-ins, no user data needed nor collected. *** A radiator's heat output is highly dependent on temperature of water entering and leaving the radiator. Nominal heat output of a radiator can be found in a catalogue or a technical brochure. The nominal heat output is valid only at the conditions specified in the catalogue. This application will calculate the heat output of the selected radiator at conditions specified by the user. This is useful for the selection of the right size of a radiator when designing a new heating system, as modern heating systems tend to use lower water temperatures than those specified in catalogues. The reason is simple: lower temperatures mean higher energy efficiency and lower cost. The application can also be used for calculating the cooling output of convectors and fan-coils at various conditions. The application is available in English, French, German and Italian languages. The application does not contain ads.

Screenshots

Reflex Pro App4 screens
RadiatorOutput2 screens

Verdict

The call

The clearest difference is update cadence: Reflex Pro App at every 4 months against RadiatorOutput's every 8 months. RadiatorOutput's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Reflex Pro App ships an update every 4 months, RadiatorOutput every 8 months. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

Scorecard2 real differences ยท 6 level
Reflex Pro App versus RadiatorOutput: the parameters behind the verdict, then further details
ParameterReflex Pro AppRadiatorOutput
PriceFreeFree
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 4 months โ€” betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
Monetizationโ€”Free
DevicesiPhone, iPodiPhone, iPad, iPod, Mac โ€” better
Requires iOS15.015.0
Further details โ€” not scored
Size19 MB1 MB
Age rating4+4+
DeveloperConSoftSebastjan Valic

In-app purchases

None

Reflex Pro App

No in-app purchases

None

RadiatorOutput

No in-app purchases

Questions

Is Reflex Pro App free?
Reflex Pro App is free to download, with no in-app purchases.
Is RadiatorOutput free?
RadiatorOutput is free to download, with no in-app purchases.
Do Reflex Pro App or RadiatorOutput have ads?
Neither Reflex Pro App nor RadiatorOutput shows ads.
Which is updated more often, Reflex Pro App or RadiatorOutput?
Reflex Pro App ships an update every 4 months, and RadiatorOutput every 8 months. Most recently, Reflex Pro App was updated on September 17, 2026 and RadiatorOutput on September 26, 2026.

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