Protractor Edge vs GhostLink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Direct angle measurement on device
- Intuitive line dragging interface
- Measures angles in photos (Premium)
- Measures from camera view (Premium)
- Ad-free experience (Premium)
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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
GhostLink
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Share your location. Leave no trace GhostLink is a private location-sharing app that helps friends, family, and trusted connections find each other without requiring phone numbers, email accounts, social logins, or an unnecessarily detailed autobiography. Whether you’re meeting friends, checking that someone arrived safely, coordinating a trip, or locating the one person who said “I’m almost there” twenty minutes ago, GhostLink gives you a simple private map for sharing GPS location. WHY GHOSTLINK? • Private location sharing Send encrypted location updates only to people you choose. • Live GPS map View trusted connections and recent movement on a clean, easy-to-read map. • Location trails See where someone recently traveled, with adjustable trail durations. • Privacy radius Share an approximate location instead of your exact coordinates. Close enough to meet up, not close enough to identify your favorite couch cushion. • Expiring connections Location sharing can end automatically instead of becoming a permanent digital houseplant nobody remembers watering. • No phone number or email Your cryptographic identity is created on your device. A username helps friends find you without turning GhostLink into another social network. • Recovery phrase Restore your identity using a private recovery phrase—no “forgot password?” email required. GhostLink is useful as a friend tracker, family locator, travel companion, meetup map, safety check-in tool, private GPS tracker, and encrypted location-sharing app. Your location is personal. Share it deliberately, temporarily, and with fewer awkward group-chat directions.
Screenshots
Verdict
The clearest difference is in-app purchases: GhostLink at none against Protractor Edge's 2. GhostLink also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 43 months). Protractor Edge's advantage is iOS requirement (9.0 vs 15.1). 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
Both are free to download. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. GhostLink asks for nothing beyond the download.
Protractor Edge ships an update every 43 months, GhostLink every 3 weeks. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.
| Parameter | Protractor Edge | GhostLink |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (55 ratings) — better | — |
| Positive reviews | 69.6% of reviews | — |
| Number of ratings | 55 — better | — |
| Update frequency | Every 43 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 21 MB | 136 MB |
| Age rating | 4+ | 4+ |
| Developer | 嵩 张 | Teo Udovcic |
In-app purchases
Protractor Edge
- Premium Access7 Days trial$1.991 Year
- Remove Ads$0.99
GhostLink
No in-app purchases
Questions
Is Protractor Edge free?
Is GhostLink free?
Do Protractor Edge or GhostLink have ads?
Which is updated more often, Protractor Edge or GhostLink?
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