# Astro Locator vs Bubble Level + Compass Pro

The clearest difference is update cadence: Astro Locator at every 3 months against Bubble Level + Compass Pro's every 17 months. Astro Locator also leads on ratings volume (68 vs 22). Bubble Level + Compass Pro's advantage is review sentiment (100% vs 77%) and rating (5.0 vs 4.8). On ads and in-app purchases there is nothing between them.

Astro Locator costs $3.99 and Bubble Level + Compass Pro $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bubble Level + Compass Pro holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 68 and 22 respectively. Written reviews point the same way: 77% of Astro Locator's written reviews are positive against 100% of Bubble Level + Compass Pro's.

Astro Locator ships an update every 3 months, Bubble Level + Compass Pro every 17 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Astro Locator | Bubble Level + Compass Pro |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | [4.8 (68 ratings)](https://appshunter.io/ios/app/astro-locator/id927483920/reviews) | **[5.0 (22 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222/reviews)** |
| Number of ratings | **68** | 22 |
| Positive reviews | 77.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 17 months |
| Monetization | **Free** | Paid |
| Size | 4 MB | 7 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Progress Concepts Limited](https://appshunter.io/developer/788761727) | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) |

## What reviewers say

### Astro Locator

[App page](https://appshunter.io/ios/app/astro-locator/id927483920)

This app assists astronomers in quickly and easily achieving polar alignment for their telescopes. It helps locate key stars like Polaris or Sigma Octantis, displaying essential astronomical data for setup and viewing. Ideal for mobile astronomers who frequently set up and pack down their equipment.

**Highlights:** Quick polar alignment, Locate Polaris/Sigma Octantis, Display elevation, latitude, longitude, Show moon phase, Sunrise/sunset times, Astro twilight times, Today Extension widget

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Astro Locator free?

Astro Locator costs $3.99, with no in-app purchases.

### Is Bubble Level + Compass Pro free?

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

### Which has better reviews, Astro Locator or Bubble Level + Compass Pro?

Bubble Level + Compass Pro is rated higher. Astro Locator averages 4.8 out of 5 from 68 ratings, while Bubble Level + Compass Pro averages 5.0 from 22 ratings.

### Do Astro Locator or Bubble Level + Compass Pro have ads?

Neither Astro Locator nor Bubble Level + Compass Pro shows ads.

### Which is updated more often, Astro Locator or Bubble Level + Compass Pro?

Astro Locator ships an update every 3 months, and Bubble Level + Compass Pro every 17 months. Most recently, Astro Locator was updated on September 17, 2026 and Bubble Level + Compass Pro on September 10, 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.*