Comparison

RIDGID Sketch vs Graph Calc Plus

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

Head to head
About

RIDGID Sketch

Create precise project plans and annotate measurements directly onto photos. This tool can be used independently or paired with a laser distance meter for accurate data capture.

Highlights
  • Measurement calculation
  • Project planning
  • Photo annotation
  • Bluetooth connectivity
  • Drawing mode
  • Photo overlay mode
Features
Read full description

RIDGID Sketch is a handy tool that allows you to calculate and communicate various measurements on your projects. It can be used on its own or in conjunction with a RIDGID LM-400 Laser Distance Meter. The app will connect to your LM-400 via Bluetooth and receive precise distance measurements from the device. RIDGID Sketch works in both drawing mode and photo overlay mode allowing you to develop precise room plans or annotate measurements within a picture.

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: ∙ 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.

Screenshots

RIDGID Sketch4 screens
Graph Calc Plus4 screens

Verdict

The call

The clearest difference is price: RIDGID Sketch at Free against Graph Calc Plus's $2.99. RIDGID Sketch also leads on update cadence (every 3 months vs every 39 months). Graph Calc Plus's advantage is iOS requirement (14.0 vs 16.6). 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

RIDGID Sketch 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

RIDGID Sketch ships an update every 3 months, Graph Calc Plus every 39 months. The most recent releases landed on August 22, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 7 level
RIDGID Sketch versus Graph Calc Plus: the parameters behind the verdict, then further details
ParameterRIDGID SketchGraph Calc Plus
PriceFree — better$2.99
Rating3.8 (9 ratings) — better—
Positive reviews21.4% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 months — betterEvery 39 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.614.0 — better
Further details — not scored
Size37 MB1 MB
Age rating4+4+
DeveloperRIDGID Software SolutionsHeng Jia Liang

In-app purchases

None

RIDGID Sketch

No in-app purchases

None

Graph Calc Plus

No in-app purchases

Questions

Is RIDGID Sketch free?
RIDGID Sketch 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 RIDGID Sketch or Graph Calc Plus have ads?
Neither RIDGID Sketch nor Graph Calc Plus shows ads.
Which is updated more often, RIDGID Sketch or Graph Calc Plus?
RIDGID Sketch ships an update every 3 months, and Graph Calc Plus every 39 months. Most recently, RIDGID Sketch was updated on August 22, 2026 and Graph Calc Plus on September 20, 2026.

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