Reflex Pro App vs RadiatorOutput
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Reflex Pro App
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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.
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.
- Calculate radiator heat output
- Adjust for water and air temperatures
- Optimize energy efficiency
- Supports low water temperature systems
- Calculate cooling output
- Metric units only
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Reflex Pro App | RadiatorOutput |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 100.0% of reviews |
| Update frequency | Every 4 months โ better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | โ | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac โ better |
| Requires iOS | 15.0 | 15.0 |
| Further details โ not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | ConSoft | Sebastjan Valic |
In-app purchases
Reflex Pro App
No in-app purchases
RadiatorOutput
No in-app purchases
Questions
Is Reflex Pro App free?
Is RadiatorOutput free?
Do Reflex Pro App or RadiatorOutput have ads?
Which is updated more often, Reflex Pro App or RadiatorOutput?
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