# Mars Info vs Simple Logarithm PRO

The clearest difference is review sentiment: Mars Info at 42% against Simple Logarithm PRO's 0%. Simple Logarithm PRO's advantage is price ($1.99 vs $6.99) and update cadence (monthly vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

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

Mars Info ships an update every 2 months, Simple Logarithm PRO monthly. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Mars Info | Simple Logarithm PRO |
| --- | --- | --- |
| Price | $6.99 | **$1.99** |
| Rating | **[4.3 (159 ratings)](https://appshunter.io/ios/app/mars-info/id1088383309/reviews)** | — |
| Number of ratings | **159** | — |
| Positive reviews | **41.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 212 MB | 180 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


### Simple Logarithm PRO

[App page](https://appshunter.io/ios/app/simple-logarithm-pro/id1662897702)

This app simplifies complex logarithm and exponentiation calculations with step-by-step solutions. It supports various input types, including decimals, fractions, and negative values, and provides a history of all calculations.

**Highlights:** Logarithm and exponentiation modes, Step-by-step solution display, Support for decimals, fractions, and negative values, Calculation history, Transformation between logarithm and exponentiation, Logarithm rules infographic, Solution sharing

**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 Simple Logarithm PRO free?

Simple Logarithm PRO costs $1.99, with no in-app purchases.

### Do Mars Info or Simple Logarithm PRO have ads?

Neither Mars Info nor Simple Logarithm PRO shows ads.

### Which is updated more often, Mars Info or Simple Logarithm PRO?

Mars Info ships an update every 2 months, and Simple Logarithm PRO monthly. Most recently, Mars Info was updated on October 21, 2026 and Simple Logarithm PRO on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*