# PF vs Polar Scope Align Pro

The clearest difference is price: PF at Free against Polar Scope Align Pro's $4.99. PF also leads on in-app purchases (none vs 3). Polar Scope Align Pro's advantage is update cadence (every 2 months vs every 11 months) and chart position (#101 vs unranked). On ads, device support and iOS requirement there is nothing between them.

PF is free to download; Polar Scope Align Pro costs $4.99 up front. Polar Scope Align Pro sells 3 one-off in-app purchases. PF asks for nothing beyond the download.

PF ships an update every 11 months, Polar Scope Align Pro every 2 months. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | PF | Polar Scope Align Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[4.9 (310 ratings)](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373/reviews)** |
| Number of ratings | — | **310** |
| Positive reviews | — | 96.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#101** |
| Size | 8 MB | 33 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) |

## What reviewers say

### PF

[App page](https://appshunter.io/ios/app/pf-l-assist/id940306488)

**In-app purchases:** none


### Polar Scope Align Pro

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

**Currently charting:** #101 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 PF free?

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

### Is Polar Scope Align Pro free?

Polar Scope Align Pro costs $4.99, and also offers in-app purchases.

### Do PF or Polar Scope Align Pro have ads?

Neither PF nor Polar Scope Align Pro shows ads.

### Which is updated more often, PF or Polar Scope Align Pro?

PF ships an update every 11 months, and Polar Scope Align Pro every 2 months. Most recently, PF was updated on October 29, 2026 and Polar Scope Align Pro on November 1, 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.*