SSFMfree vs Trigonometric Calculation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SSFMfree
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鉄工所職人の為のリファレンス（便覧）アプリです。 各種鋼材（形鋼）の寸法表および重量表を表示します。 断面詳細図、単位重量を画面をフリックするだけで簡単に閲覧できます。 単位重量が表示されている箇所をタップすれば重量計算画面に移り、寸法と数量を入力して総重量を自動計算します。また集計表の作成も出来ます。 このアプリケーションソフト(SSFM)のご使用は全て利用者の自己責任において行うものとします。 本アプリケーションソフトを運用した結果生じた損害について、作者は一切の責任を負いません。 内容、データについては万全を期すつもりですが、もし誤りがあればお知らせください。 画面下部に広告が表示されます。 画面操作の反応が重い機種で表示が乱れることがあります。
Trigonometric Calculation
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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.
Screenshots
Verdict
The clearest difference is update cadence: Trigonometric Calculation at every 6 weeks against SSFMfree's every 11 months. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SSFMfree ships an update every 11 months, Trigonometric Calculation every 6 weeks. The most recent releases landed on February 21, 2026 and May 16, 2026 respectively.
| Parameter | SSFMfree | Trigonometric Calculation |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 11 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | sigeyosi kanenishi | Risako Asai |
In-app purchases
SSFMfree
No in-app purchases
Trigonometric Calculation
No in-app purchases
Questions
Is SSFMfree free?
Is Trigonometric Calculation free?
Do SSFMfree or Trigonometric Calculation have ads?
Which is updated more often, SSFMfree or Trigonometric Calculation?
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