Comparison

年号電卓Plus vs Protractor Measuring Angle

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

Head to head
About

年号電卓Plus

Easily convert between Western and Japanese eras, and determine birth years from age. Explore historical context with explanations for era changes and significant events of each year.

Highlights
  • Western to Japanese era conversion
  • Japanese era to Western conversion
  • Calculate birth year from age
  • View era start and end dates
  • Understand reasons for era changes
  • Discover major events of each year
Features
Read full description

年号・元号の変換に迷ったら、このアプリひとつで解決! 待望の西暦和暦早見表に対応しました! 西暦⇔和暦の変換から、年齢での誕生年検索まで、日常のちょっとした疑問をすばやく解消できます。 さらに Apple Watch に対応! 手首でサッと確認できるようになりました。 調べるだけでなく、改元の理由やその年の主な出来事もわかるので、歴史の勉強や雑学としても楽しめます。 【変換モード】 ・西暦 → 和暦(令和・平成・昭和・大正・明治) ・各元号 → 西暦 ・年齢 → 西暦・和暦(誕生年を逆算) 【詳細情報】 ・各元号の開始年・終了年を表示 ・改元の理由(iPhone版のみ) ・その年の主な出来事 ※Apple Watch版では改元理由の表示はありません。 【iPhone版・Apple Watch版の違い】 ・iPhone版は西暦和暦早見表に対応。 ・iPhone版はテンキー入力に対応。和暦の上限を超えた年(例:大正16年)をそのまま入力・表示しながら、西暦や次の元号への変換結果を確認できます。 ・Apple Watch版はテンキー入力の代わりにカウント操作を採用。和暦の上限に達すると自動的に次の元号へ切り替わるため、直感的に操作できます(例:大正15年の次は自動で昭和2年に)。 【Apple Watch版の操作】 ・上にスワイプすることで、年齢・各元号の開始年/終了年・その年の主な出来事をまとめて確認できます。 ・+/-ボタンの長押しで高速カウントアップ/カウントダウンが可能。目的の年にすばやくたどり着けます。

About

Protractor Measuring Angle

This app transforms your iPhone into a versatile digital measuring tool. It offers multiple functions to measure angles, slopes, distances, and even height using your device's sensors and camera. Save and review your measurement history for future reference.

Highlights
  • Inclinometer for real-time tilt measurement
  • Screen protractor for precise angle reading
  • Camera level with horizon overlay
  • Photo angle measurement on existing images
  • Height calculator using trigonometry
  • AR Measure for 3D space measurements
  • On-screen ruler and digital compass
Read full description

Protractor Measuring Angle turns your iPhone into a precise digital toolbox — measure any angle, slope, or distance in seconds. 8 TOOLS IN ONE APP ▸ Inclinometer Real-time tilt measurement using your device sensors. Edge mode reads walls and frames; Flat mode works face-up on surfaces. Tap Calibrate to zero any offset. Freeze the reading with one tap. ▸ Screen Protractor Drag two arms to any angle and read the value instantly. Perfect for blueprints, technical drawings, and any image that needs an exact angle. ▸ Camera Level Live camera with a horizon overlay line. Freeze the frame to capture and save the reading. ▸ Photo Angle Measure angles directly on photos from your library using the same drag-and-lock protractor. ▸ Height Calculator Point at the top of a tree, building, or mast. Enter the distance to its base and your eye height — the app computes the exact height using trigonometry. ▸ AR Measure Drop points in augmented reality to measure real-world distances and the angle between any three points in 3D space. ▸ On-Screen Ruler A calibrated ruler in centimeters or inches. Run calibration once and it stays precise on your device. ▸ Compass Digital compass with cardinal and intercardinal directions. FLEXIBLE UNITS Switch between degrees, radians, percent slope, and roof pitch (X:12) for angles. Length reads in cm, in, m, or ft. MEASUREMENT HISTORY Every saved reading is logged with a thumbnail, timestamp, and optional note. Review, edit, or share any past measurement. Works offline. No account needed. Privacy Policy - https://msrtech.net/apps/protractor-measuring/privacy.html Terms - https://msrtech.net/apps/protractor-measuring/terms.html EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

年号電卓Plus4 screens
Protractor Measuring Angle4 screens

Verdict

The call

The clearest difference is update cadence: Protractor Measuring Angle at every 2 days against 年号電卓Plus's every 6 weeks. On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

年号電卓Plus ships an update every 6 weeks, Protractor Measuring Angle every 2 days. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

Scorecard1 real difference · 9 level
年号電卓Plus versus Protractor Measuring Angle: the parameters behind the verdict, then further details
Parameter年号電卓PlusProtractor Measuring Angle
PriceFreeFree
Rating—4.5 (2 ratings) — better
Positive reviews37.5% of reviews—
Number of ratings—2 — better
Update frequencyEvery 6 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size7 MB16 MB
Age rating4+4+
DeveloperNakanishi ToshihikoMSR TECH LLP

Customer experience

年号電卓Plus

Written reviews8 reviews
Positive37.5%
Neutral0.0%
Negative62.5%

Protractor Measuring Angle

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

年号電卓Plus

No in-app purchases

None

Protractor Measuring Angle

No in-app purchases

Questions

Is 年号電卓Plus free?
年号電卓Plus is free to download, with no in-app purchases.
Is Protractor Measuring Angle free?
Protractor Measuring Angle is free to download, with no in-app purchases.
Do 年号電卓Plus or Protractor Measuring Angle have ads?
Neither 年号電卓Plus nor Protractor Measuring Angle shows ads.
Which is updated more often, 年号電卓Plus or Protractor Measuring Angle?
年号電卓Plus ships an update every 6 weeks, and Protractor Measuring Angle every 2 days. Most recently, 年号電卓Plus was updated on October 12, 2026 and Protractor Measuring Angle on October 2, 2026.

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