Comparison

GeoMaster vs Protractor Angle Meter

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

Head to head
About

GeoMaster

Features
Read full description

使用條款:https://xianghe-chen.github.io/ 隱私權政策:https://xianghe-chen.github.io/ GeoMaster 是專為測量工程師、土地測量師和建築師設計的專業測量計算工具。提供完整的測量功能,讓您能夠高效準確地完成各種測量任務。 【核心功能】 • 距離與方位角計算 精確計算兩點之間的距離和方位角,支援度分秒和密位顯示。 • 座標計算 透過觀測數據(方位角、垂直角、距離)計算目標點座標和高程。 • 座標轉換 支援 WGS84、TWD97、UTM51 等多種座標系統之間的轉換。 • 高程計算 提供高程差計算和高程計算功能,支援地球曲率和大氣折射修正。 • 地圖測量 在地圖上進行測量,支援距離、方位角、面積計算,可創建和管理測量專案。 • 專業指南針 提供專業的指南針功能,顯示方位角和密位,支援鎖定功能。 【專業版功能】 • 導線測量:完整的導線測量功能,支援閉合、附合、支導線,自動計算閉合差和精度評定。 • 三角測量:提供前方交會、後方交會、側方交會等三角測量方法。 • 水準測量:水準網平差、閉合差計算與分配、精度評定。 • 批量數據處理:批量座標轉換、數據匯入/匯出,支援 CSV 和 Excel 格式。 • 測站管理:專業的測站數據管理系統,支援測站創建、編輯、查詢。 • 記錄管理:保存和管理所有測量記錄,方便日後查閱和分析。 • 高級匯出:支援 CSV、DXF、KML 等多種格式的數據匯出。 • 無限專案和點位:專業版用戶可創建無限專案和點位。 【適用對象】 • 測量工程師 • 土地測量師 • 建築師 • 土木工程師 • 相關專業人士 【特色優勢】 • 專業準確:採用專業測量算法,確保計算結果的準確性。 • 易於使用:直觀的用戶界面,操作簡單便捷。 • 功能完整:涵蓋測量工作的各個環節。 • 數據管理:完善的專案和數據管理功能。 • 多座標系統:支援多種常用座標系統。

About

Protractor Angle Meter

This app allows you to measure angles from photos using your device's camera or existing images. Add multiple measurements with customizable colors and labels, and view results in various units. Save your work automatically and export high-quality images of your measurements.

Highlights
  • Measure angles from photos
  • Live camera or photo library input
  • Multiple angle measurements per photo
  • Customizable color and labels
  • Degrees, radians, or slope percentage output
  • Precision Loupe for accuracy
  • Automatic saving
Features
Read full description

Protractor Angle Meter turns any photo into a precise workspace for measuring one angle or many. Frame an object in the live camera and freeze the image, or choose a photo from your library. Add as many angle measurements as you need to one photo. Change each measurement’s color and add an optional label so even complex checks remain easy to read. Use a shared pivot with two rays, or switch to four-point mode for two independent lines—even when their intersection lies outside the image. Drag any point while the Precision Loupe shows an enlarged crosshair above your finger. Pinch to zoom, pan the image, snap in 15° steps, and feel haptic feedback as you adjust. Measure interior, exterior, and reflex angles. View results in degrees, radians, or slope percentage. Every change saves automatically, so you can return to a measurement whenever you need it. With Premium Pass, export and share a clear JPEG containing the photo, colored measurement lines, arcs, values, and labels. Your saved source photo remains unchanged. No ads. Save up to 10 photo-based measurement records for free, with unlimited angle measurements inside every record. A one-time Premium Pass unlocks result-image sharing and unlimited records. No subscription.

Screenshots

GeoMaster3 screens
Protractor Angle Meter4 screens

Verdict

The call

The clearest difference is update cadence: Protractor Angle Meter at fortnightly against GeoMaster's every 4 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. GeoMaster sells 3 in-app purchases, starting at $4.99 per month and Protractor Angle Meter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GeoMaster ships an update every 4 months, Protractor Angle Meter fortnightly. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 9 level
GeoMaster versus Protractor Angle Meter: the parameters behind the verdict, then further details
ParameterGeoMasterProtractor Angle Meter
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.6 — better
Further details — not scored
Size3 MB56 MB
Age rating4+4+
DeveloperXiang he ChenRomiick LLC

In-app purchases

3 purchases

GeoMaster

Subscriptions2
  • 月度訂閱7 Days trial$4.991 Month
  • 年度訂閱7 Days trial$49.991 Year
One-time1
  • 永久買斷$99.99
1 purchases

Protractor Angle Meter

One-time1
  • Premium Pass$9.99

Questions

Is GeoMaster free?
GeoMaster is free to download, with in-app purchases available.
Is Protractor Angle Meter free?
Protractor Angle Meter is free to download, with in-app purchases available.
Do GeoMaster or Protractor Angle Meter have ads?
Neither GeoMaster nor Protractor Angle Meter shows ads.
Which is updated more often, GeoMaster or Protractor Angle Meter?
GeoMaster ships an update every 4 months, and Protractor Angle Meter fortnightly. Most recently, GeoMaster was updated on October 8, 2026 and Protractor Angle Meter on October 6, 2026.

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