Comparison

Triangle3 vs Haikan Pipit

Price, ratings, monetisation and update history for both apps, side by side โ€” 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
Read full description

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". ใ€€ใ€€1ยผB -> 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

Haikan Pipit

Calculate precise cut lengths for various pipe fittings and view their dimensions in a 3D catalog. Supports multiple fitting types with plans for future additions like sharing and quantity estimation.

Highlights
  • Cut length calculation for fitting combinations
  • 3D pipe catalog with dimension drawings
  • Support for DV, TS/HI, HT, White-thread, Water Supply Core, Butt-weld, and Stainless Press-Type fittings
  • Future updates planned for sharing and quantity estimation
  • View pipe and fitting shapes and dimensions
Features
Read full description

What is Piping Pipit? Piping Pipit is an app that lets you quickly calculate cut lengths from combinations of fittings. What you can do with Piping Pipit Cut length calculation ใ€€โ†’ Calculate cut lengths based on fitting combinations Check dimension drawings ใ€€โ†’ View pipe and fitting shapes and dimensions in a 3D pipe catalog Currently supported fittings DV fittings (PVC drainage pipes) TS/HI fittings (PVC water supply pipes) HT fittings (PVC supply pipes) White-thread fittings (Threaded malleable iron pipe fittings) Water Supply Core Fittings (Threaded Anti-Corrosion Pipe-End Fittings for Lined Steel Pipes) Butt-weld fittings Stainless Press-Type Fittings. Additional fittings will be supported in future updates. Features such as sharing containers and measurement results with others, as well as quantity estimation, are also planned. Stay tuned! For the Terms of Use of Piping Pipit, please see here (same content as available on the App Store): https://netstill.com/terms/

Screenshots

Triangle34 screens
Haikan Pipit4 screens

Verdict

The call

The clearest difference is price: Haikan Pipit at Free against Triangle3's $3.99. Triangle3's advantage is review sentiment (40% vs 0%) and in-app purchases (none vs 2). On update cadence, 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

Haikan Pipit is free to download; Triangle3 costs $3.99 up front. Haikan Pipit 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, Haikan Pipit every 3 weeks. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

Scorecard5 real differences ยท 3 level
Triangle3 versus Haikan Pipit: the parameters behind the verdict, then further details
ParameterTriangle3Haikan Pipit
Price$3.99Free โ€” better
Positive reviews40.0% of reviews โ€” better0.0% of reviews
Update frequencyEvery 5 weeksEvery 3 weeks โ€” better
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
MonetizationPaidFree with in-app purchases โ€” better
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.0 โ€” better15.6
Further details โ€” not scored
Size7 MB220 MB
Age rating4+4+
Developerryo sasakiNETSTILL LIMITED LIABILITY CO.

Customer experience

Triangle3

Written reviews10 reviews
Positive40.0%
Neutral30.0%
Negative30.0%

Haikan Pipit

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Triangle3

No in-app purchases

2 purchases

Haikan Pipit

Subscriptions2
  • ใƒ—ใƒญ็‰ˆ๏ผˆ1ใƒถๆœˆ๏ผ‰7 Days trial$3.991 Month
  • ใƒ—ใƒญ็‰ˆ๏ผˆ1ๅนด้–“๏ผ‰14 Days trial$39.991 Year

Questions

Is Triangle3 free?
Triangle3 costs $3.99, with no in-app purchases.
Is Haikan Pipit free?
Haikan Pipit is free to download, with in-app purchases available.
Do Triangle3 or Haikan Pipit have ads?
Haikan Pipit shows ads; Triangle3 does not.
Which is updated more often, Triangle3 or Haikan Pipit?
Triangle3 ships an update every 5 weeks, and Haikan Pipit every 3 weeks. Most recently, Triangle3 was updated on September 13, 2026 and Haikan Pipit on September 22, 2026.

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