Screen Ruler vs 台形の完全計算アプリ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Screen Ruler
Transform your iPhone or iPad into a digital ruler. Measure small objects directly on your screen using centimeters or inches, with magnifier assistance and haptic feedback for precise alignment. Calibrate the ruler for accurate results.
- Calibratable digital ruler
- Centimeter and inch scales
- Magnifier for precise alignment
- Haptic feedback
- Measure small objects on screen
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Turn your iPhone or iPad into a calibratable digital ruler for measuring small objects directly on the screen. Screen Ruler supports centimeters and inches, magnifier-assisted alignment, and haptic feedback. Measure Small Objects on Your Screen Use Screen Ruler for stationery, frames, craft materials, and other small objects that fit along your device screen. Place the object directly on the screen, move the measurement marks to its edges, and read the length. Core Features • Calibratable ruler: Match the scale to an object of known length and save calibration for your device. • CM and inch scales: Switch between centimeters and inches for everyday measurements. • Magnifier assist: Align measurement marks with object edges more confidently. • Haptic feedback: Feel subtle feedback while adjusting the marks. How to Get More Reliable Results For best results, place the object directly on the screen and check the scale against a known length. Calibrate the ruler if you notice an offset. Accuracy and Limitations Screen Ruler is designed for short, everyday measurements. Accuracy depends on device calibration, screen placement, and how precisely the marks are aligned. It does not use the camera or AR and is not intended for measuring rooms or large objects. Feedback: ankek1er@gmail.com
台形の完全計算アプリ
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Trapezoiderは、台形に関する計算をすばやく、美しく、直感的に行うための計算アプリです。 面積、角度、長さ、体積、図心など、台形でよく使う計算をひとつのアプリにまとめました。黒と金を基調にした見やすい画面で、入力した値に合わせて図形がリアルタイムに変化します。 主な機能 ・面積計算 上底、下底、高さ、面積のうち3つを入力すると、残り1つを自動計算します。 ・角度計算 底角、上角、片側張出などを計算できます。台形の形を確認しながら、角度の関係を把握できます。 ・長さ計算 上底、下底、高さから脚の長さや対角線を計算できます。 ・体積計算 円錐台、台形断面の角柱、四角錐台の体積計算に対応しています。用途に合わせてモードを切り替えられます。 ・図心計算 台形の図心位置を計算できます。建築、土木、設計、学習用途で便利です。 ・表示設定 小数点以下の桁数、四捨五入、切り捨て、切り上げ、表示単位を設定できます。 こんな方におすすめ ・中学、高校、大学で図形や工学を学ぶ方 ・授業や教材作成で台形の計算を確認したい先生 ・DIY、外構、間取り、面積計算を行う方 ・建築、土木、測量、設計の現場で素早く数値を確認したい方 Trapezoiderは、単なる計算機ではありません。 台形に特化することで、必要な入力、結果、図形の変化をひとつの画面で自然に確認できるように設計しています。 台形の計算を、もっと速く。 そして、もっと美しく。
Screenshots
Verdict
The clearest difference is price: Screen Ruler at Free against 台形の完全計算アプリ's $2.99. 台形の完全計算アプリ'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
Screen Ruler is free to download; 台形の完全計算アプリ costs $2.99 up front. Screen Ruler sells 2 one-off in-app purchases. 台形の完全計算アプリ asks for nothing beyond the download.
Screen Ruler ships an update every 3 months, 台形の完全計算アプリ daily. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.
| Parameter | Screen Ruler | 台形の完全計算アプリ |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 3.7 (27 ratings) — better | — |
| Positive reviews | 53.1% of reviews | — |
| Number of ratings | 27 — better | — |
| Update frequency | Every 3 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 19 MB |
| Age rating | +4 | 4+ |
| Developer | 向阳 杨 | kotobaz |
In-app purchases
Screen Ruler
- Ads-free experience$1.99
- Support for a cup of coffee$2.99
台形の完全計算アプリ
No in-app purchases









