Comparison

Trigonometric Calculation vs BijaVault

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

Head to head
About

Trigonometric Calculation

Features
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This is a calculation application for finding angles and side lengths of triangles. 1 We would appreciate a review if there are any problems such as calculation glitches. 2 I hope you will use this application for simple calculations. Please understand that we cannot be held responsible for any impact or disadvantage related to the quality of production activities caused by the calculations in this application.

About

BijaVault

Features
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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

Trigonometric Calculation4 screens
BijaVault4 screens

Verdict

The call

The clearest difference is in-app purchases: Trigonometric Calculation at none against BijaVault's 2. Trigonometric Calculation also leads on iOS requirement (15.5 vs 17.0). BijaVault's advantage is update cadence (every 3 days vs every 6 weeks). On price, ads and device support 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

Both are free to download. BijaVault sells 2 in-app purchases, starting at $4.99 per month. Trigonometric Calculation asks for nothing beyond the download.

UpkeepUpdate frequency

Trigonometric Calculation ships an update every 6 weeks, BijaVault every 3 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

Scorecard3 real differences ยท 3 level
Trigonometric Calculation versus BijaVault: the parameters behind the verdict, then further details
ParameterTrigonometric CalculationBijaVault
PriceFreeFree
Update frequencyEvery 6 weeksEvery 3 days โ€” better
AdsYesYes
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.5 โ€” better17.0
Further details โ€” not scored
Size5 MB26 MB
Age rating4+4+
DeveloperRisako AsaiTRADE CENTER, K.K.

In-app purchases

None

Trigonometric Calculation

No in-app purchases

2 purchases

BijaVault

Subscriptions2
  • BijaVault Pro Monthly1 Month trial$4.991 Month
  • BijaVault Pro Yearly1 Month trial$47.991 Year

Questions

Is Trigonometric Calculation free?
Trigonometric Calculation is free to download, with no in-app purchases.
Is BijaVault free?
BijaVault is free to download, with in-app purchases available.
Do Trigonometric Calculation or BijaVault have ads?
Both Trigonometric Calculation and BijaVault show ads.
Which is updated more often, Trigonometric Calculation or BijaVault?
Trigonometric Calculation ships an update every 6 weeks, and BijaVault every 3 days. Most recently, Trigonometric Calculation was updated on October 13, 2026 and BijaVault on October 24, 2026.

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