# Bubble Level + Compass Pro vs Arc Calculator

The clearest difference is price: Bubble Level + Compass Pro at $0.99 against Arc Calculator's $2.99. Bubble Level + Compass Pro also leads on device support (4 vs 2). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Bubble Level + Compass Pro costs $0.99 and Arc Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bubble Level + Compass Pro ships an update every 17 months, Arc Calculator every 24 months. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Bubble Level + Compass Pro | Arc Calculator |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[5.0 (22 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 17 months** | Every 24 months |
| Monetization | Paid | — |
| Size | 7 MB | 21 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### Bubble Level + Compass Pro

[App page](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222)

This utility app provides a precise spirit level and compass for your iPhone and Apple Watch. Get live readings on your wrist, even when your phone's screen is out of sight. Features include bullseye, horizontal, and vertical levels with 0.1-degree precision.

**Highlights:** Bullseye, horizontal, and vertical levels, 0.1-degree precision, True and magnetic heading, Apple Watch companion app, Gyro or accelerometer sensor mode, Red-light night mode

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Arc Calculator

[App page](https://appshunter.io/ios/app/arc-calculator-round-corner/id1640028642)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level + Compass Pro free?

Bubble Level + Compass Pro costs $0.99, with no in-app purchases.

### Is Arc Calculator free?

Arc Calculator costs $2.99, with no in-app purchases.

### Do Bubble Level + Compass Pro or Arc Calculator have ads?

Neither Bubble Level + Compass Pro nor Arc Calculator shows ads.

### Which is updated more often, Bubble Level + Compass Pro or Arc Calculator?

Bubble Level + Compass Pro ships an update every 17 months, and Arc Calculator every 24 months. Most recently, Bubble Level + Compass Pro was updated on October 10, 2026 and Arc Calculator on October 5, 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.*