One North vs Protractor°
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One North
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One North is a digital access key for tenants & their employees at Solaris One North building. The app is required for entry and exit of security gates at both the North and South blocks and usage of cargo lifts (request for permission at reception counter). Users may use the app to invite guests, whom will receive a digital access card via email to access the security gates. Access to the app is limited to building tenants & their employees only, please request for an account from your company's system administrator. Guests to the building may receive a digital guest access card from their respective inviter or request for one from the reception counter.
Protractor°
This app transforms your iPhone Duo into a digital protractor. Measure angles on paper or between surfaces by simply folding the device to match the desired angle and reading the degrees. Save and organize your measurements for later use.
- Measure angles on paper
- Measure angles between surfaces
- Uses iPhone Duo's folding hinge
- Record and save angle readings
- Organize measurements by date
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Use your iPhone Duo as a protractor. Fold it to match an angle and read the degrees. Requires iPhone Duo with iOS 27.1 or later. Measurement uses the phone's folding hinge and isn't available on other devices. MEASURE ON PAPER Stand the phone on its bottom edges and line up each edge with a line on the page. Open or close the fold until both edges match. CHECK TWO SURFACES Rest each half of the phone against a surface and fold it to fit the angle where they meet. Read the angle as you adjust it. KEEP YOUR READINGS Tap Record when you're ready. History groups your saved angles by day and shows the time of each reading. Delete individual readings or clear them all. Next time you need a protractor, unfold your phone.
Screenshots
Verdict
The clearest difference is in-app purchases: One North at none against Protractor°'s 1. One North also leads on iOS requirement (15.1 vs 26.0). Protractor°'s advantage is update cadence (every 2 days vs every 5 weeks). On price, ads 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° sells 1 one-off in-app purchase. One North asks for nothing beyond the download.
One North ships an update every 5 weeks, Protractor° every 2 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | One North | Protractor° |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 36 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Chimeric Technologies Pte. Ltd. | Just2us Pte Ltd |
In-app purchases
One North
No in-app purchases
Protractor°
- Protractor Lifetime Access$3.99









