Graph Calc Plus vs X2Power Marine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Graph Calc Plus
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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: ∙ Set individual line color. ∙ Show/Hide individual mathematical expression. ∙ Pinch to Zoom in/out Graph View. ∙ Pan to reposition Graph View. ∙ Add up to 22 mathematical expressions. ∙ Full screen preview. Graph Features: ∙ Custom background color for Graph. ∙ Custom grid color for Graph. ∙ Show/Hide Grid Lines/Minor Grid Lines. ∙ Show/Hide Axis Number. ∙ Show/Hide X-Axis. ∙ Show/Hide Y-Axis. ∙ Set Graph Line Width range from 0.5~5.0. Some of the most commonly used functions: y = mx + b y = x**2 [x²] y = x**3 [x³] y = sqrt(x) [√x] 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 ϕ (the Golden Ratio). Also recognized as ϕ() pi - returns the value of π. Also recognized as π() pi_2 - returns the value of π/2 pi_4 - returns the value of π/4 tau - returns the value of τ. Also recognized as τ() 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.
X2Power Marine
Monitor your X2Power Lithium Marine battery's status in real-time. This app provides vital information like voltage, current, capacity, and charge status via Bluetooth, enhancing battery safety and usability.
- Real-time voltage monitoring
- Operating current and power display
- Remaining battery capacity
- Charging time estimation
- Battery cycle count
- Full Charge Capacity (FCC) data
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Welcome to X2Power. Utilizing Bluetooth technology, use this app to connect to the built-in Battery Management System (BMS) in your X2Power Lithium Marine battery. The app allows you to check on the battery’s status, collect vital, real-time information during battery operation, and help increase the safety and usability of your X2Power lithium marine battery. Information provided includes: 1. Real-time voltage 2. Operating current and power (if under load) 3. Remaining capacity 4. Charging time (if in recharge state) 5. Cycles of use 6. Full Charge Capacity (FCC)
Screenshots
Verdict
The clearest difference is price: X2Power Marine at Free against Graph Calc Plus's $2.99. X2Power Marine also leads on update cadence (every 2 months vs every 39 months) and iOS requirement (12.0 vs 14.0). 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
X2Power Marine 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.
Graph Calc Plus ships an update every 39 months, X2Power Marine every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Graph Calc Plus | X2Power Marine |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 3.1 (15 ratings) — better |
| Positive reviews | — | 44.4% of reviews |
| Number of ratings | — | 15 — better |
| Update frequency | Every 39 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Heng Jia Liang | Batteries Plus LLC |
In-app purchases
Graph Calc Plus
No in-app purchases
X2Power Marine
No in-app purchases
Questions
Is Graph Calc Plus free?
Is X2Power Marine free?
Do Graph Calc Plus or X2Power Marine have ads?
Which is updated more often, Graph Calc Plus or X2Power Marine?
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