# Ruler with Caliper, Protractor vs Intervals

The clearest difference is review sentiment: Intervals at 100% against Ruler with Caliper, Protractor's 0%. Intervals also leads on in-app purchases (none vs 3) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Ruler with Caliper, Protractor sells 3 in-app purchases, starting at $3.99 per 7 days. Intervals asks for nothing beyond the download.

Ruler with Caliper, Protractor ships an update every 28 months, Intervals every 2 weeks. The most recent releases landed on August 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Ruler with Caliper, Protractor | Intervals |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/intervals-pro-timer/id6504121358/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 28 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 1 MB |
| Requires iOS | **16.0** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Aydin Metel](https://appshunter.io/developer/1750982740) |

## What reviewers say

### Ruler with Caliper, Protractor

[App page](https://appshunter.io/ios/app/ruler-with-caliper-protractor/id1368462815)

This app transforms your device into a precise digital measuring tool. It offers accurate measurements for various objects and distances using your camera, with multiple units and offline functionality.

**Highlights:** Accurate measurements via camera, Measure small objects to large distances, User-friendly interface, Multiple measurement units (inches, cm), Virtual ruler on screen, Save and share measurements, Offline accessibility

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Yearly | $39.99 | per year |
| Lifetime | $49.99 | one-time |


### Intervals

[App page](https://appshunter.io/ios/app/intervals-pro-timer/id6504121358)

This app helps you manage work and rest periods with customizable timers. It features a visual countdown, interval tracking, and audible alerts to keep you focused and balanced during workouts, study sessions, or tasks.

**Highlights:** Customizable work and rest intervals, Round and total time calculation, Visual circular timer, Pause, resume, and navigate controls, Audible chime alerts, Progress indicators

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ruler with Caliper, Protractor free?

Ruler with Caliper, Protractor is free to download, with in-app purchases available.

### Is Intervals free?

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

### Do Ruler with Caliper, Protractor or Intervals have ads?

Ruler with Caliper, Protractor shows ads; Intervals does not.

### Which is updated more often, Ruler with Caliper, Protractor or Intervals?

Ruler with Caliper, Protractor ships an update every 28 months, and Intervals every 2 weeks. Most recently, Ruler with Caliper, Protractor was updated on August 13, 2026 and Intervals on September 18, 2026.

---

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