Protractor Edge vs Trig Instruments Toolbox
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
Trig Instruments Toolbox
This utility app provides a collection of essential field tools, including a ratio to angle converter, inclinometer, tally counter, and protractor. It leverages your device's sensors for accurate estimations and calculations, reducing the need to carry multiple physical instruments.
- Ratio to Angle converter
- Inclinometer
- Tally counter
- Protractor
- Uses device sensors for accuracy
- New free tools added regularly
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Each tool is designed to be useful in the field, so you don't need to bring a pile of equipment and notes with you to do estimations and calculations. Taking advantage of your device's built in gyro, compass and camera, to give the most accurate results. The Trig Tool Box contains: • Ratio to Angle converter • Inclinometer • Tally counter • Protractor With more free tools being added all the time. Download now to keep this tool box in your back pocket - you never know when they will come in handy.
Screenshots
Verdict
The clearest difference is rating: Protractor Edge at 4.5 against Trig Instruments Toolbox's 2.6. Protractor Edge also leads on review sentiment (70% vs 50%) and ratings volume (55 vs 5). Trig Instruments Toolbox's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence 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. Trig Instruments Toolbox asks for nothing beyond the download.
Protractor Edge holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: Protractor Edge has 55 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 70% of Protractor Edge's written reviews are positive against 50% of Trig Instruments Toolbox's.
Protractor Edge ships an update every 43 months, Trig Instruments Toolbox every 27 months. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.
| Parameter | Protractor Edge | Trig Instruments Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (55 ratings) — better | 2.6 (5 ratings) |
| Positive reviews | 69.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 55 — better | 5 |
| Update frequency | Every 43 months | Every 27 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 21 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | 嵩 张 | Stevens Marketing Limited |
Customer experience
Protractor Edge
Trig Instruments Toolbox
In-app purchases
Protractor Edge
- Premium Access7 Days trial$1.991 Year
- Remove Ads$0.99
Trig Instruments Toolbox
No in-app purchases
Questions
Is Protractor Edge free?
Is Trig Instruments Toolbox free?
Which has better reviews, Protractor Edge or Trig Instruments Toolbox?
Do Protractor Edge or Trig Instruments Toolbox have ads?
Which is updated more often, Protractor Edge or Trig Instruments Toolbox?
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