# Simple Logarithm PRO vs Learn Writing and Tracing 123

The clearest difference is price: Learn Writing and Tracing 123 at Free against Simple Logarithm PRO's $1.99. Simple Logarithm PRO's advantage is update cadence (monthly vs every 5 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Learn Writing and Tracing 123 is free to download; Simple Logarithm PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Simple Logarithm PRO ships an update monthly, Learn Writing and Tracing 123 every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Simple Logarithm PRO | Learn Writing and Tracing 123 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.6 (41 ratings)](https://appshunter.io/ios/app/learn-writing-and-tracing-123/id6469451589/reviews)** |
| Number of ratings | — | **41** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Paid | **Free** |
| Size | 180 MB | 8 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Marvin Krueger](https://appshunter.io/developer/1152894281) |

## What reviewers say

### 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


### Learn Writing and Tracing 123

[App page](https://appshunter.io/ios/app/learn-writing-and-tracing-123/id6469451589)

This app offers a fun and engaging way for children to practice writing numbers, drawing shapes, and tracing letters. It aims to boost creativity and confidence while developing essential handwriting skills through interactive tracing activities.

**Highlights:** Number tracing practice, Shape drawing exercises, Letter writing practice, Sparks creativity, Boosts confidence, Develops crucial skills

**In-app purchases:** none


## Frequently asked questions

### Is Simple Logarithm PRO free?

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

### Is Learn Writing and Tracing 123 free?

Learn Writing and Tracing 123 is free to download, with no in-app purchases.

### Do Simple Logarithm PRO or Learn Writing and Tracing 123 have ads?

Neither Simple Logarithm PRO nor Learn Writing and Tracing 123 shows ads.

### Which is updated more often, Simple Logarithm PRO or Learn Writing and Tracing 123?

Simple Logarithm PRO ships an update monthly, and Learn Writing and Tracing 123 every 5 months. Most recently, Simple Logarithm PRO was updated on November 3, 2026 and Learn Writing and Tracing 123 on November 3, 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.*