Triangle3 vs BijaVault
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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". 1¼B -> 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.
BijaVault
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Just write, and AI sorts your notes so you can find them later. A Markdown notepad. BijaVault is a Markdown note app. What you write stays on your device as a plain text file, and you can access it in the Files app at any time. Nothing is locked into a private format, so your files remain readable even if you stop using the app. WRITE WHAT YOU SEE Write headings, bold text, lists, tables, and code without typing markup yourself. Everything is saved as Markdown. FIND IT LATER Filter by the type and tags written at the top of each note, then search the text and file names from there. This keeps your results precise, avoiding standard searches that match too many similar notes at once. Two-character Japanese words are searchable too. LET IT SORT ITSELF BijaVault reads each note and writes its type, title, and tags at the top of the file. Anything already written stays as it is. When two notes look alike, it suggests merging them or deleting one. Deleted notes move to a trash folder, so you can bring them back within 30 days. Organizing runs through the server while you are signed in. The text of your notes passes through the server to be organized. It is not stored there and is not used to train AI. If you don't sign in, your note text is not sent anywhere. Organizing requires sign-in and consent to send note text, and usage limits apply. SEND THINGS IN Share a URL or text from Safari or another app, and it arrives as a note. JAPANESE AND ENGLISH The interface is available in both languages. WHAT YOU GET Subscribe to Pro and creating and editing are always open. Eligible new subscribers get one month free. After that, the subscription renews automatically at the paid price unless canceled. Without a subscription, watching one rewarded ad unlocks creating and editing for three days. Reading, searching, and exporting the notes in your list does not require a subscription. Not paying never locks you out of your own notes. If you still cannot create or edit notes twenty days after the free period ends, or thirty days after your subscription expires, your notes are removed from the list. They are not deleted: they move to a dated Archive folder in Documents. Archived notes no longer appear in in-app search, but you can open them from the Files app. WHERE YOUR NOTES LIVE In Documents/Notes inside the app, as plain .md files. Terms of Use: https://bija-vault.com/terms/en/ Privacy Policy: https://bija-vault.com/privacy/en/
Screenshots
Verdict
The clearest difference is price: BijaVault at Free against Triangle3's $3.99. BijaVault also leads on update cadence (every 3 days vs every 5 weeks). Triangle3's advantage is in-app purchases (none vs 2) and ads (none vs shown). On 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
BijaVault is free to download; Triangle3 costs $3.99 up front. BijaVault sells 2 in-app purchases, starting at $4.99 per month. Triangle3 asks for nothing beyond the download.
Triangle3 ships an update every 5 weeks, BijaVault every 3 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | Triangle3 | BijaVault |
|---|---|---|
| Price | $3.99 | Free — better |
| Positive reviews | 40.0% of reviews | — |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | ryo sasaki | TRADE CENTER, K.K. |
In-app purchases
Triangle3
No in-app purchases
BijaVault
- BijaVault Pro Monthly1 Month trial$4.991 Month
- BijaVault Pro Yearly1 Month trial$47.991 Year








