# Clinometer + bubble level vs Polar Scope Align Pro

The clearest difference is rating: Polar Scope Align Pro at 4.9 against Clinometer + bubble level's 4.0. Polar Scope Align Pro also leads on ratings volume (305 vs 42). Clinometer + bubble level's advantage is price ($1.99 vs $3.99) and iOS requirement (11.0 vs 13.0). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Clinometer + bubble level costs $1.99 and Polar Scope Align Pro $3.99 up front. Clinometer + bubble level sells 3 one-off in-app purchases and Polar Scope Align Pro sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Polar Scope Align Pro holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Polar Scope Align Pro has 305 ratings behind it against 42, so its average is the more settled of the two. Written reviews point the same way: 91% of Clinometer + bubble level's written reviews are positive against 97% of Polar Scope Align Pro's.

Clinometer + bubble level ships an update every 4 months, Polar Scope Align Pro every 2 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Clinometer + bubble level | Polar Scope Align Pro |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | [4.0 (42 ratings)](https://appshunter.io/ios/app/clinometer-plus-bubble-level/id286215117/reviews) | **[4.9 (305 ratings)](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373/reviews)** |
| Number of ratings | 42 | **305** |
| Positive reviews | 90.6% of reviews | **97.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #143 | **#98** |
| Size | 14 MB | 32 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Breitling](https://appshunter.io/developer/286215120) | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) |

## What reviewers say

### Clinometer + bubble level

[App page](https://appshunter.io/ios/app/clinometer-plus-bubble-level/id286215117)

**Currently charting:** #143 Top Paid · Utilities (US App Store)

This professional tool offers precise slope measurement using all sides of your device and its camera. It supports various modes, relative angle measurements, and advanced calibration for accurate results in diverse applications.

**Highlights:** Multiple measurement modes (Clinometer, Camera, Bubble Level), Relative angle measurement, Advanced two-way calibration, Speech synthesis for readings, Five unit modes (degrees, percentage, rise/run), Motion-sensitive lock feature, Peer mode for two-device measurements

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Updates Level Bronze | $0.99 | one-time |
| Support Developer Level Silver | $2.99 | one-time |
| Support Developer Level Gold | $7.99 | one-time |

**What reviewers like**

- 👍 Accurate and reliable
- 🚀 Easy to use and calibrate
- 💡 Useful for various applications (construction, DIY, etc.)
- 🔍 Helpful for aligning satellite dishes, solar panels, and more
- 🔍 Great for leveling and measuring angles

**What reviewers complain about**

- 🐛 Calibration issues on some devices
- 🐛 Occasional crashes or freezes
- 🔍 Not accurate enough for some specialized uses (e.g., golf greens)
- 🔍 Lack of clear instructions or tutorial

**Reported bugs**

- Calibration not working correctly on some devices
- App freezing or crashing on launch for some users
- Readings not accurate when device is in a case

**Requested features**

- Dark mode or night-friendly interface
- Ability to measure average slope over a distance
- Option to display both degrees and percent slope
- Integration with camera for sighting and measuring angles
- Bluetooth connectivity to pair multiple devices


### Polar Scope Align Pro

[App page](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373)

**Currently charting:** #98 Top Paid · Utilities (US App Store)

This app assists astronomers with precise polar alignment for telescopes, offering tools for various reticles and low-latitude accuracy. It also includes a comprehensive suite of astro tools, from object databases to calculators and weather reports.

**Highlights:** Accurate polar alignment calculation, Support for numerous polar scope reticles, Daytime/no polarscope alignment tool, Deep Space Object database, Astrophotography calculators, World astro-weather report

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip 1x | $0.99 | one-time |
| Tip 4x | $3.99 | one-time |
| Tip 10x | $9.99 | one-time |

**What reviewers like**

- 🚀 Best Polar Alignment App
- 👍 Detailed Instructions and Explanations
- 👍 Fantastic App with Many Useful Features
- 👍 Intuitive and No Distractions
- 👍 Comprehensive Astronomy App

**What reviewers complain about**

- 🐛 Compass Inaccurate
- 🐛 Location Data Inaccurate

**Reported bugs**

- Weather Updates Not Working
- Compass Deflected by Mount

**Requested features**

- Add Observation Recording Feature
- Add Push To Option for DSO Objects


## Frequently asked questions

### Is Clinometer + bubble level free?

Clinometer + bubble level costs $1.99, and also offers in-app purchases.

### Is Polar Scope Align Pro free?

Polar Scope Align Pro costs $3.99, and also offers in-app purchases.

### Which has better reviews, Clinometer + bubble level or Polar Scope Align Pro?

Polar Scope Align Pro is rated higher. Clinometer + bubble level averages 4.0 out of 5 from 42 ratings, while Polar Scope Align Pro averages 4.9 from 305 ratings.

### Do Clinometer + bubble level or Polar Scope Align Pro have ads?

Neither Clinometer + bubble level nor Polar Scope Align Pro shows ads.

### Which is updated more often, Clinometer + bubble level or Polar Scope Align Pro?

Clinometer + bubble level ships an update every 4 months, and Polar Scope Align Pro every 2 months. Most recently, Clinometer + bubble level was updated on October 14, 2026 and Polar Scope Align Pro on October 12, 2026.

### Which is more popular, Clinometer + bubble level or Polar Scope Align Pro?

Clinometer + bubble level currently peaks at #143 in the App Store charts, and Polar Scope Align Pro at #98. Chart position reflects recent download velocity rather than total install base.

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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.*