Protractor vs ApCalendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor
Measure angles precisely using your phone's screen, gyroscope, or camera. Offers smart presets, real-time feedback with high accuracy, and calibration features to adapt to various situations.
- 3-in-1 measurement modes
- Smart angle presets with alerts
- Hyper-responsive feedback (≤0.5° accuracy)
- Auto dynamic compensation calibration
- Anti-shake technology for motion scenes
- Screen lock for measurements
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Ditch bulky tools! Measure angles precisely anywhere with just your phone. *** Features *** ► Full-Scene Precision Measurement * 3-in-1 Modes: Screen Protractor / Gyroscope Protractor/ Camera Protractor, adapt to different scenarios. * Smart Angle Preset: Input target angles for instant deviation alerts. * Hyper-Responsive Feedback: Real-time tracking with ≤0.5° accuracy. ► Triple-Calibration Assurance * Auto Dynamic Compensation: Device-position-aware baseline calibration * Anti-Shake Tech: 80% accuracy boost in motion scenes (Gyroscope Mode) * Screen lock: Freeze measurements instantly to prevent accidental touches. ► Contact Us * Email: ceo@noadit.com
ApCalendar
A versatile calendar tool offering multiple styles, including lunar calendar support and public holidays. Users can add notes to their calendar events.
- Multiple calendar styles
- Lunar calendar support
- Public holiday tracking
- Add calendar notes
- Event reminders
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日历工具，日历多风格，支持农历,公众假期，添加日历笔记 。
Screenshots
Verdict
The clearest difference is rating: ApCalendar at 5.0 against Protractor's 1.8. ApCalendar also leads on in-app purchases (none vs 6) and iOS requirement (11.0 vs 17.0). Protractor's advantage is ratings volume (6 vs 1). 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 6 in-app purchases, starting at $4.99 per month. ApCalendar asks for nothing beyond the download.
ApCalendar holds the better App Store score, 5.0 against 1.8. That said, the two scores are not equally well evidenced: Protractor has 6 ratings behind it against 1, so its average is the more settled of the two.
| Parameter | Protractor | ApCalendar |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 63.6% of reviews | — |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 5 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Noadit, Inc. | Adtech Innovation Limited |
Customer experience
Protractor
ApCalendar
In-app purchases
Protractor
- VIP3 Days trial$4.991 Month
- Bubble Tea$0.99
- Sponsor$4.99
- Coffee$4.99
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- Sponsor$19.99
- Sponsor$99.99
ApCalendar
No in-app purchases
Questions
Is Protractor free?
Is ApCalendar free?
Which has better reviews, Protractor or ApCalendar?
Do Protractor or ApCalendar have ads?
Other comparisons
