Comparison

Triangle3 vs Weld Positioner RPM

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

Head to head
About

Triangle3

This app provides advanced calculation tools for field work, specializing in right and unequal triangles. It supports complex shapes like cones, pipes, and screw wings, with AR visualization for floor plans. It also includes standard calculator functions and memory features.

Highlights
  • Right and unequal triangle calculations
  • Complex shape development (cones, pipes, etc.)
  • Augmented Reality (AR) floor plan visualization
  • Standard calculator functions with memory
  • Trigonometric and cosine theorem calculations
  • PCD and screw wing calculations
Features
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This is a calculator application created by me, a canner, focusing on the functions of a calculator necessary for field work. Even if you don't understand trigonometric functions, you can easily calculate with this calculator. It can calculate right triangles and unequal triangles. It can calculate memory, answer memory, pi, repetition, parentheses, trigonometric functions, and cosine theorem. Develop cones (including misalignment), diagonal cuts, R-cuts, T-pipes, shrimp tubes, rounded corners, rounded corners (eccentricity), hopper eccentricity, pipes from mirror plates, connecting pipes to tapered pipes, screw wings, and calculate PCD. It is possible to display the development on the floor in full size with AR for a specific development. User's Manual ############################ Calculator section Press and hold the "ANS" button to display past calculation results. Tap the label of the calculation result (right after pressing =) to mark the value in the ANS list. Tap the white button to enter the value displayed on the label. Swipe the screen to the left or right to rotate the right triangle. Swipe the screen up and down to flip the right triangle. Enter two right triangles and three unequal triangles. Tap the "Cal" button to display the calculation result. Tap "Cl" button to clear the displayed value. You can also use the "0" label to erase only the specified locations. If you touch the button and slide it down, the numerical value of the calculation result will be displayed on the label, and can be used for the next calculation. Trigonometric calculations can be done with By sliding the [4] and [6] buttons, you can go back and forward. Pressing the CLR button once will erase the number. Press twice to reset the rotation. Press and hold to erase numbers, reset rotation, and erase memory. Press and hold to erase numbers, reset rotation, and clear memory. Automatic input of pipe outline Example 50A -> Input "5", "0", "1 slide". γ€€γ€€1ΒΌB -> Input "1", "4", "1" and "2 slides". Each slide twice in succession will reduce the value by half. Expansion section The input method is the same as in the calculator section. To expand a pipe, PCD, or mirror, slide the screen to the left or right to select the expansion diagram. Basically, all buttons need to be entered, but in some places "0" can be used. For round corners (eccentricity), double-tap the screen after entering the numerical value for round corners to switch to the input screen. Please enter the division of the circumference in multiples of 4. The calculation result is an image, so it may differ from the actual shape. Disclaimer Although every effort has been made to ensure the accuracy of the calculation results in this application, the accuracy is not guaranteed. Please note that we are not responsible for any damage, loss, or disadvantage caused by the use of this application.

About

Weld Positioner RPM

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Measure, display, and save your welding positioner's rotation speed instantly using your iPhone. Tap START and place your iPhone on the turntable following the on-screen instructions, or place it first and then tap START. The app automatically detects rotation and displays the RPM. The table does not need to be perfectly level, though level is ideal. Place your iPhone anywhere from the center outward. Start rotating only after the app displays "Start rotating". Measurement results are not valid if the iPhone is placed while the table is already rotating. Even if the manufacturer, machine size, or gear ratio differs, this app lets you set the same rotation speed across different equipment. Save your welding conditions for quick recall and consistent reproduction. Key Features RPM Measurement & Display - 1 rpm and above: 2 decimal places (e.g. 5.66 rpm) - 0.01 to below 1 rpm: 3 decimal places (e.g. 0.551 rpm) - Measurement parameters can be finely adjusted to match your rotation speed and equipment. Save Up to 50 Welding Condition Records Capture RPM automatically from measurement results. Quickly recall saved conditions for consistent reproduction across different equipment. Records can be sorted by date or pipe size. Detailed Condition Logging - Pipe size: 3/8" (10A/DN10) to 24" (600A/DN600) - Weld type: Fillet, Butt, Other - Material: Carbon, Stainless, Aluminum, Titanium, Other - Process: TIG, Solid, Flux-Cored, Metal-Cored, Other - Current value and notes Easy Data Sharing Export and import via CSV file with one tap. Share welding data across your team for greater efficiency. Privacy Measurement data is stored only on your device. No data is sent to external servers. Please Note Measurement results should be used as a reference only. If there is any discrepancy between this description and the actual behavior, the app's behavior takes precedence. Upon installation, you can try 15 measurements to experience the app. A subscription unlocks unlimited measurements and full access to all features. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Triangle34 screens
Weld Positioner RPM4 screens

Verdict

The call

The clearest difference is price: Weld Positioner RPM at Free against Triangle3's $3.99. Weld Positioner RPM also leads on update cadence (every 2 days vs every 5 weeks). Triangle3's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 26.2). On ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Weld Positioner RPM is free to download; Triangle3 costs $3.99 up front. Weld Positioner RPM sells 2 in-app purchases, starting at $3.99 per month. Triangle3 asks for nothing beyond the download.

UpkeepUpdate frequency

Triangle3 ships an update every 5 weeks, Weld Positioner RPM every 2 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard4 real differences Β· 4 level
Triangle3 versus Weld Positioner RPM: the parameters behind the verdict, then further details
ParameterTriangle3Weld Positioner RPM
Price$3.99Free β€” better
Positive reviews40.0% of reviewsβ€”
Update frequencyEvery 5 weeksEvery 2 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationPaidβ€”
DevicesiPhone, iPod β€” betteriPhone
Requires iOS15.0 β€” better26.2
Further details β€” not scored
Size7 MB8 MB
Age rating4+17+
Developerryo sasakiMasashi Konno

In-app purchases

None

Triangle3

No in-app purchases

2 purchases

Weld Positioner RPM

Subscriptions2
  • Weld Positioner Monthly$3.991 Month
  • Weld Positioner Yearly$39.991 Year

Questions

Is Triangle3 free?
Triangle3 costs $3.99, with no in-app purchases.
Is Weld Positioner RPM free?
Weld Positioner RPM is free to download, with in-app purchases available.
Do Triangle3 or Weld Positioner RPM have ads?
Neither Triangle3 nor Weld Positioner RPM shows ads.
Which is updated more often, Triangle3 or Weld Positioner RPM?
Triangle3 ships an update every 5 weeks, and Weld Positioner RPM every 2 days. Most recently, Triangle3 was updated on October 30, 2026 and Weld Positioner RPM on October 28, 2026.

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