Protractor Edge vs ION UPS IoT
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
ION UPS IoT
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Mobile app for end user to monitor the status of ION UPS.
Screenshots
Verdict
The clearest difference is in-app purchases: ION UPS IoT at none against Protractor Edge's 2. ION UPS IoT also leads on ads (none vs shown) and update cadence (every 6 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. ION UPS IoT asks for nothing beyond the download.
Protractor Edge ships an update every 43 months, ION UPS IoT every 6 weeks. The most recent releases landed on October 20, 2026 and October 2, 2026 respectively.
| Parameter | Protractor Edge | ION UPS IoT |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (94 ratings) — better | — |
| Positive reviews | 69.6% of reviews | — |
| Number of ratings | 94 — better | — |
| Update frequency | Every 43 months | Every 6 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 | 20 MB |
| Age rating | 4+ | 12+ |
| Developer | 嵩 张 | Adem Kalan |
In-app purchases
Protractor Edge
- Premium Access7 Days trial$1.991 Year
- Remove Ads$0.99
ION UPS IoT
No in-app purchases
Questions
Is Protractor Edge free?
Is ION UPS IoT free?
Do Protractor Edge or ION UPS IoT have ads?
Which is updated more often, Protractor Edge or ION UPS IoT?
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