# Contact Backup vs Protractor Angle Measure App

The clearest difference is in-app purchases: Contact Backup at none against Protractor Angle Measure App's 2. Contact Backup also leads on ads (none vs shown). Protractor Angle Measure App's advantage is update cadence (every 4 months vs every 40 months) and iOS requirement (13.0 vs 16). On price and device support there is nothing between them.

Both are free to download. Protractor Angle Measure App sells 2 in-app purchases, starting at $3.99 per month. Contact Backup asks for nothing beyond the download.

Contact Backup ships an update every 40 months, Protractor Angle Measure App every 4 months. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Contact Backup | Protractor Angle Measure App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (4 ratings)](https://appshunter.io/ios/app/protractor-angle-measure-app/id6755661639/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 40 months | **Every 4 months** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 57 MB |
| Requires iOS | 16 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Dazhuo Information Technology Co., Ltd.](https://appshunter.io/developer/1470341377) | [Ebenezer Oteng](https://appshunter.io/developer/1840002550) |

## What reviewers say

### Contact Backup

[App page](https://appshunter.io/ios/app/contact-backupimport-and-export/id1492958197)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Protractor Angle Measure App

[App page](https://appshunter.io/ios/app/protractor-angle-measure-app/id6755661639)

This tool allows for instant and accurate angle measurements using a digital protractor, camera overlay, and ruler. It supports 180° and 360° measurements, ideal for students, engineers, builders, and DIYers for various projects.

**Highlights:** Accurate digital protractor, 180° & 360° measurement, Camera overlay for real-time angles, Ruler mode for line measurement, Angle lock and precision control, Simple, distraction-free interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $3.99 | per month |
| Lifetime access | $9.99 | one-time |


## Frequently asked questions

### Is Contact Backup free?

Contact Backup is free to download, with no in-app purchases.

### Is Protractor Angle Measure App free?

Protractor Angle Measure App is free to download, with in-app purchases available.

### Do Contact Backup or Protractor Angle Measure App have ads?

Protractor Angle Measure App shows ads; Contact Backup does not.

### Which is updated more often, Contact Backup or Protractor Angle Measure App?

Contact Backup ships an update every 40 months, and Protractor Angle Measure App every 4 months. Most recently, Contact Backup was updated on November 3, 2026 and Protractor Angle Measure App on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*