Comparison

iHeatLoss vs EVsaas

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

Head to head
About

iHeatLoss

This app assists plumbers and heating engineers in calculating the heat output needed for each room in a building. It accounts for fabric and ventilation heat loss, providing results in Watts and BTU to help select appropriate radiators. The app also tracks multiple rooms to estimate the total heating system requirement.

Highlights
  • Room-by-room heat loss calculation
  • Fabric and ventilation loss inclusion
  • Multiple room tracking
  • Watts and BTU output display
  • Reference data for temperature and air change
  • Total heating output estimation
Features
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Heatloss helps plumbers, heating engineers, and installers estimate the heat output required for each room in a building. Calculate fabric and ventilation heat loss using room dimensions, component areas, U-values, internal temperatures, external temperatures, and air-change rates. Each room’s result is shown in both Watts and BTU, helping you choose a radiator with an appropriate heat output. The app keeps track of every room in the project and provides a running total for the whole building, giving a clear estimate of the overall heat output required from the heating system or boiler. Features • Calculate room-by-room heat loss • Include fabric and ventilation losses • Track multiple rooms in one building • View totals in Watts and BTU • Use room temperature and air-change reference data • Estimate the total heating output required for the property

About

EVsaas

Features
Read full description

Welcome to the evsaas charging application. With evsaas, you will be able to check and control the charging state, making the charging operation of electric vehicles easier and more intelligent. features: -Connect to the electric vehicle charger via WiFi. -You can freely choose the charging amount and mode to charge. -Start / stop charging through RFID card or app. -You can view the detailed charging order. -Even if you are away, you can remotely control and manage the electric vehicle charger. -Monitor the electric vehicle charger in real time to ensure safe charging.

Screenshots

iHeatLoss4 screens
EVsaas2 screens

Verdict

The call

The clearest difference is price: EVsaas at Free against iHeatLoss's $5.99. EVsaas also leads on update cadence (every 3 weeks vs every 12 months) and iOS requirement (11.0 vs 17.6). 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

CostPrice · In-app purchases · Ads · Monetization

EVsaas is free to download; iHeatLoss costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

iHeatLoss ships an update every 12 months, EVsaas every 3 weeks. The most recent releases landed on October 23, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
iHeatLoss versus EVsaas: the parameters behind the verdict, then further details
ParameteriHeatLossEVsaas
Price$5.99Free — better
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 12 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.611.0 — better
Further details — not scored
Size9 MB55 MB
Age rating4+4+
DeveloperNavtech Softwarezhejiang benyi new energy technology co.,ltd.

In-app purchases

None

iHeatLoss

No in-app purchases

None

EVsaas

No in-app purchases

Questions

Is iHeatLoss free?
iHeatLoss costs $5.99, with no in-app purchases.
Is EVsaas free?
EVsaas is free to download, with no in-app purchases.
Do iHeatLoss or EVsaas have ads?
Neither iHeatLoss nor EVsaas shows ads.
Which is updated more often, iHeatLoss or EVsaas?
iHeatLoss ships an update every 12 months, and EVsaas every 3 weeks. Most recently, iHeatLoss was updated on October 23, 2026 and EVsaas on September 30, 2026.

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