Comparison

Graph Calc Plus vs FED

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

Head to head
About

Graph Calc Plus

Features
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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.

About

FED

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The app FED-LOGIN Access is the access key for commissioners, partners and employees to enterprise resources of the Swiss Federal Administration. FED-LOGIN is available for this enterprise collaboration worldwide. For the non-enterprise context (e-government), however, the app AGOV Access must be used!

Screenshots

Graph Calc Plus4 screens
FED4 screens

Verdict

The call

The clearest difference is price: FED at Free against Graph Calc Plus's $2.99. FED also leads on update cadence (every 4 months 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

FED 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

Graph Calc Plus ships an update every 39 months, FED every 4 months. The most recent releases landed on December 13, 2025 and July 31, 2026 respectively.

Scorecard2 real differences ยท 4 level
Graph Calc Plus versus FED: the parameters behind the verdict, then further details
ParameterGraph Calc PlusFED
Price$2.99Free โ€” better
Update frequencyEvery 39 monthsEvery 4 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS14.014.0
Further details โ€” not scored
Size1 MB129 MB
Age rating4+4+
DeveloperHeng Jia LiangSchweizerische Bundeskanzlei

In-app purchases

None

Graph Calc Plus

No in-app purchases

None

FED

No in-app purchases

Questions

Is Graph Calc Plus free?
Graph Calc Plus costs $2.99, with no in-app purchases.
Is FED free?
FED is free to download, with no in-app purchases.
Do Graph Calc Plus or FED have ads?
Neither Graph Calc Plus nor FED shows ads.
Which is updated more often, Graph Calc Plus or FED?
Graph Calc Plus ships an update every 39 months, and FED every 4 months. Most recently, Graph Calc Plus was updated on December 13, 2025 and FED on July 31, 2026.

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