Comparison

Protractor Edge vs POScan

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

Head to head
About

Protractor Edge

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

Highlights
  • Direct angle measurement on device
  • Intuitive line dragging interface
  • Measures angles in photos (Premium)
  • Measures from camera view (Premium)
  • Ad-free experience (Premium)
Features
Read full description

A simple protractor. Just put your device on the angle you want to measure. Then drag the two lines to align the both sides of the angle. The degrees will be there. It is different from other protractor apps. This is a new way to measure angles. It requires neither taking photo nor putting the angle above the screen. Now start using this handy assistant to measure angles which will save you a lot of time. ------------------------------------- PREMIUM ACCESS SUBSCRIPTION - Measure the world from camera - Measure angles in photos - No Ads - The subscription is $0.99 yearly with trial - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable - Terms of use: https://service.notationpad.com/terms_service.html

About

POScan

Features
Read full description

【功能一:高精度3D扫描建模】 无需繁杂专业设备!仅凭借手机前置相机搭配专属扫描支架,短短 5 分钟,即可构建出毫米级精度的 3D 模型。该功能高度适配支具、矫形器、康复辅具等定制标准,无论是足部精准扫描,还是针对脊柱侧弯的精细检测,亦或是头部模型的构建,其还原度均在行业内遥遥领先。无论是医生、技师,还是患者本人,都能轻松上手操作,畅享便捷高效的 3D 扫描建模体验。 【功能二:分级订单管理】 在分级订单管理方面,这款 App 设计了极为完善的系统。它支持多种身份登录,适配多角色权限设定。临床角色在日常工作中,能够通过一键操作完成下单流程,极大提升工作效率。财务人员拥有专属的审批权限,可对订单费用等关键信息进行严格把控,确保每一笔资金的合理使用。同时,生产环节的进度实现了实时追踪功能,从订单接收、材料准备,到制作过程中的每一道工序,直至成品完成,各个阶段的信息都能清晰呈现。整个订单流程透明可控,各方人员能够随时掌握订单动态,有效避免信息不对称带来的沟通成本,让订单管理更加智能、灵活、高效 。 【联系和反馈】 对于产品如有任何疑问和建议,请联系我们 网站:http://www.gostarton.com/ 联系电话:1811-4028-505 邮箱:startontek@163.com

Screenshots

Protractor Edge2 screens
POScan4 screens

Verdict

The call

The clearest difference is in-app purchases: POScan at none against Protractor Edge's 2. POScan also leads on ads (none vs shown) and update cadence (every 5 days vs every 43 months). Protractor Edge's advantage is iOS requirement (9.0 vs 16). 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. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. POScan asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor Edge ships an update every 43 months, POScan every 5 days. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 6 level
Protractor Edge versus POScan: the parameters behind the verdict, then further details
ParameterProtractor EdgePOScan
PriceFreeFree
Rating4.2 (94 ratings) — better—
Positive reviews69.6% of reviews—
Number of ratings94 — better—
Update frequencyEvery 43 monthsEvery 5 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better16
Further details — not scored
Size21 MB56 MB
Age rating4+17+
Developer嵩 张ollobaby

In-app purchases

2 purchases

Protractor Edge

Subscriptions1
  • Premium Access7 Days trial$1.991 Year
One-time1
  • Remove Ads$0.99
None

POScan

No in-app purchases

Questions

Is Protractor Edge free?
Protractor Edge is free to download, with in-app purchases available.
Is POScan free?
POScan is free to download, with no in-app purchases.
Do Protractor Edge or POScan have ads?
Protractor Edge shows ads; POScan does not.
Which is updated more often, Protractor Edge or POScan?
Protractor Edge ships an update every 43 months, and POScan every 5 days. Most recently, Protractor Edge was updated on November 2, 2026 and POScan on October 28, 2026.

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