Comparison

Thermia Online vs Graph Calc Plus

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

Head to head
About

Thermia Online

Remotely control and monitor your compatible heat pump from any internet-connected device. Adjust settings like temperature for comfort and receive alerts for any issues.

Highlights
  • Remote heat pump control
  • Temperature adjustment
  • Real-time monitoring
  • Issue alerts
  • Supports various product models
  • Access from any device
Features
Read full description

The App supports product models: Atec, Atria, Atella, Diplomat Optimum G3 & G2, Diplomat Optimum, Diplomat, Diplomat Comfort, Legend, iTec Eco, iTec, Solid. (from 2008). With the Thermia Online accessory, you can control and monitor your heatpump from any smartphone, computer or tablet, wherever you are in the world. For example, you can lower the temperature when you are on holiday, and increase it for when you come back. If you come home earlier than expected; no problem - using Online, you can easily ensure that your house is warm and comfortable whenever you need it to be. If anything unexpected comes up and needs to be fixed, you will immediately receive this information via Online. Contact your retailer for more information.

About

Graph Calc Plus

Features
Read full description

Graph Calculator define the graph of [f] to be the graph of the equation y = f(x). So, the graph of a function if a special case of the graph of an equation. Features: โˆ™ Set individual line color. โˆ™ Show/Hide individual mathematical expression. โˆ™ Pinch to Zoom in/out Graph View. โˆ™ Pan to reposition Graph View. โˆ™ Add up to 22 mathematical expressions. โˆ™ Full screen preview. Graph Features: โˆ™ Custom background color for Graph. โˆ™ Custom grid color for Graph. โˆ™ Show/Hide Grid Lines/Minor Grid Lines. โˆ™ Show/Hide Axis Number. โˆ™ Show/Hide X-Axis. โˆ™ Show/Hide Y-Axis. โˆ™ Set Graph Line Width range from 0.5~5.0. Some of the most commonly used functions: y = mx + b y = x**2 [xยฒ] y = x**3 [xยณ] y = sqrt(x) [โˆšx] y = ln(x) y = log(x) y = sin(x) y = cos(x) y = tan(x) Standard Operators: + - addition and unary positive - - subtraction and negation * - multiplication / - division ! - factorial ** - pow, exponentiation sqrt(x) - square root cuberoot(x) - cubic root Standard parameters (constant): phi - returns the value of ฯ• (the Golden Ratio). Also recognized as ฯ•() pi - returns the value of ฯ€. Also recognized as ฯ€() pi_2 - returns the value of ฯ€/2 pi_4 - returns the value of ฯ€/4 tau - returns the value of ฯ„. Also recognized as ฯ„() sqrt2 - returns the value of the square root of 2 e - returns the value of e log2e - returns the value of the log base 2 of e log10e - returns the value of the log base 10 of e ln2 - returns the value of the log base e of 2 ln10 - returns the value of the log base e of 10 Standard Functions that take 1 parameter: sqrt() - returns the square root of the passed parameter log() - returns the base 10 log of the passed parameter ln() - returns the base e log of the passed parameter log2() - returns the base 2 log of the passed parameter ceil() - returns the passed parameter rounded up floor() - returns the passed parameter rounded down Trigonometric functions: sin(), cos(), tan() Their inverses (asin, acos, atan, atan2) Their reciprocals (csc, sec, cotan) The reciprocals of the inverses (acsc, asec, acotan) The hyperbolic variations of all the above functions (sinh, cosh, tanh, asinh, acosh, atanh, csch, sech, cotanh, acsch, asech, acotanh) The versine functions (versin, vercosin, coversin, covercosin, haversin, havercosin, hacoversin, hacovercosin, exsec, excsc, crd) dtor() - converts the passed parameter from degrees to radians rtod() - converts the passed parameter from radians to degrees Quick Start: 1. Tap on [+] button. 2. Change the equation of the line to y=3x+1 and see graphed. 3. You can also enter equations that are not solved for x e.g. x=2y+2 About Graph Calculator In mathematics, the graph of a function f is the set of ordered pairs (x,y), where f(x)=y. In the common case where x and f(x) are real numbers, these pairs are Cartesian coordinates of points in two-dimensional space and thus form a subset of this plane. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Thermia Online4 screens
Graph Calc Plus4 screens

Verdict

The call

The clearest difference is price: Thermia Online at Free against Graph Calc Plus's $2.99. Thermia Online also leads on update cadence (every 6 weeks vs every 39 months). On ads, in-app purchases, device support 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

Thermia Online is free to download; Graph Calc Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Thermia Online ships an update every 6 weeks, Graph Calc Plus every 39 months. The most recent releases landed on June 5, 2026 and December 13, 2025 respectively.

Scorecard2 real differences ยท 6 level
Thermia Online versus Graph Calc Plus: the parameters behind the verdict, then further details
ParameterThermia OnlineGraph Calc Plus
PriceFree โ€” better$2.99
Positive reviews40.0% of reviewsโ€”
Update frequencyEvery 6 weeks โ€” betterEvery 39 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 โ€” better14.0
Further details โ€” not scored
Size23 MB1 MB
Age rating17+4+
DeveloperThermia ABHeng Jia Liang

In-app purchases

None

Thermia Online

No in-app purchases

None

Graph Calc Plus

No in-app purchases

Questions

Is Thermia Online free?
Thermia Online is free to download, with no in-app purchases.
Is Graph Calc Plus free?
Graph Calc Plus costs $2.99, with no in-app purchases.
Do Thermia Online or Graph Calc Plus have ads?
Neither Thermia Online nor Graph Calc Plus shows ads.
Which is updated more often, Thermia Online or Graph Calc Plus?
Thermia Online ships an update every 6 weeks, and Graph Calc Plus every 39 months. Most recently, Thermia Online was updated on June 5, 2026 and Graph Calc Plus on December 13, 2025.

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