# Mars Info vs Unit Circle Calculator PRO

The clearest difference is review sentiment: Unit Circle Calculator PRO at 100% against Mars Info's 42%. Unit Circle Calculator PRO also leads on rating (4.7 vs 4.3) and price ($1.99 vs $6.99). Mars Info's advantage is ratings volume (159 vs 25). On ads, in-app purchases and device support there is nothing between them.

Mars Info costs $6.99 and Unit Circle Calculator PRO $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unit Circle Calculator PRO holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Mars Info has 159 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 42% of Mars Info's written reviews are positive against 100% of Unit Circle Calculator PRO's.

Mars Info ships an update every 2 months, Unit Circle Calculator PRO monthly. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Mars Info | Unit Circle Calculator PRO |
| --- | --- | --- |
| Price | $6.99 | **$1.99** |
| Rating | [4.3 (159 ratings)](https://appshunter.io/ios/app/mars-info/id1088383309/reviews) | **[4.7 (25 ratings)](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541/reviews)** |
| Number of ratings | **159** | 25 |
| Positive reviews | 41.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 212 MB | 181 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Viktor Goltvyanytsya](https://appshunter.io/developer/556365139) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Mars Info

[App page](https://appshunter.io/ios/app/mars-info/id1088383309)

Explore the Red Planet with an interactive 3D globe. Discover and learn about key Martian locations like volcanoes, craters, and mountains. View detailed information including size and coordinates for each point of interest.

**Highlights:** Interactive 3D globe with gesture controls, Pinpoint 80+ interesting Martian locations, Detailed information on locations, Zoom, rotate, and tilt controls, List of selectable locations

**Features:** Vision Pro support

**In-app purchases:** none


### Unit Circle Calculator PRO

[App page](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats including negative values, decimals, fractions, and pi. Save, share, and revisit past calculations.

**Highlights:** Unit circle visualization, Step-by-step calculation, Diagrams and animations, Supports negative values, decimals, fractions, and π, Calculation history, Shareable solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is Mars Info free?

Mars Info costs $6.99, with no in-app purchases.

### Is Unit Circle Calculator PRO free?

Unit Circle Calculator PRO costs $1.99, with no in-app purchases.

### Which has better reviews, Mars Info or Unit Circle Calculator PRO?

Unit Circle Calculator PRO is rated higher. Mars Info averages 4.3 out of 5 from 159 ratings, while Unit Circle Calculator PRO averages 4.7 from 25 ratings.

### Do Mars Info or Unit Circle Calculator PRO have ads?

Neither Mars Info nor Unit Circle Calculator PRO shows ads.

### Which is updated more often, Mars Info or Unit Circle Calculator PRO?

Mars Info ships an update every 2 months, and Unit Circle Calculator PRO monthly. Most recently, Mars Info was updated on November 2, 2026 and Unit Circle Calculator PRO on November 7, 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.*