Comparison

ただの電卓 vs BijaVault

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

Head to head
About

ただの電卓

Features
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iPhoneやiPadで使える。多目的な計算機です。 ※機能 機能は計算と多少の公式計算が出来ます。 銀行の金利の計算 消費税の計算 将来の貯金額の計算 株式配当率計算 比例式の計算 などの計算が数値を入力するだけで計算する事ができます。 計算画面広告なし 古い端末でも起動できます。

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

ただの電卓3 screens
BijaVault4 screens

Verdict

The call

The clearest difference is in-app purchases: ただの電卓 at none against BijaVault's 2. ただの電卓 also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). BijaVault's advantage is update cadence (every 3 days vs fortnightly). On price 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

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

UpkeepUpdate frequency

ただの電卓 ships an update fortnightly, BijaVault every 3 days. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 5 level
ただの電卓 versus BijaVault: the parameters behind the verdict, then further details
Parameterただの電卓BijaVault
PriceFreeFree
Rating4.3 (3 ratings) — better—
Positive reviews70.0% of reviews—
Number of ratings3 — better—
Update frequencyFortnightlyEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size14 MB26 MB
Age rating4+4+
DeveloperHIROKI HORIGUCHITRADE CENTER, K.K.

In-app purchases

None

ただの電卓

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 ただの電卓 free?
ただの電卓 is free to download, with no in-app purchases.
Is BijaVault free?
BijaVault is free to download, with in-app purchases available.
Do ただの電卓 or BijaVault have ads?
BijaVault shows ads; ただの電卓 does not.
Which is updated more often, ただの電卓 or BijaVault?
ただの電卓 ships an update fortnightly, and BijaVault every 3 days. Most recently, ただの電卓 was updated on October 12, 2026 and BijaVault on October 24, 2026.

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