# 555 Timer & Oscillators Guide vs Learn Electronics & Arduino

The clearest difference is in-app purchases: 555 Timer & Oscillators Guide at none against Learn Electronics & Arduino's 2. Learn Electronics & Arduino's advantage is update cadence (every 6 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Learn Electronics & Arduino sells 2 in-app purchases, starting at $4.99 per month. 555 Timer & Oscillators Guide asks for nothing beyond the download.

555 Timer & Oscillators Guide ships an update every 5 months, Learn Electronics & Arduino every 6 days. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 555 Timer & Oscillators Guide | Learn Electronics & Arduino |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/learn-electronics-and-arduino/id6786012093/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 71 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [MEHMET CANKER (TR)](https://appshunter.io/developer/1565350155) |

## What reviewers say

### 555 Timer & Oscillators Guide

[App page](https://appshunter.io/ios/app/555-timer-and-oscillators-guide/id6504487994)

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

**In-app purchases:** none


### Learn Electronics & Arduino

[App page](https://appshunter.io/ios/app/learn-electronics-and-arduino/id6786012093)

Learn electronics and Arduino programming through interactive lessons and simulations on your phone. Build real projects with no prior experience or hardware needed. Covers fundamentals to advanced projects with guided labs and quizzes.

**Highlights:** Interactive 3D circuit simulations, Built-in Arduino sketch editor and interpreter, 124 lessons across 4 learning worlds, 52 hands-on guided labs, Offline functionality, Multi-language support

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Electronics Pro - Monthly | $4.99 | per month |
| Electronics Pro - Yearly | $14.99 | per year |


## Frequently asked questions

### Is 555 Timer & Oscillators Guide free?

555 Timer & Oscillators Guide is free to download, with no in-app purchases.

### Is Learn Electronics & Arduino free?

Learn Electronics & Arduino is free to download, with in-app purchases available.

### Do 555 Timer & Oscillators Guide or Learn Electronics & Arduino have ads?

Both 555 Timer & Oscillators Guide and Learn Electronics & Arduino show ads.

### Which is updated more often, 555 Timer & Oscillators Guide or Learn Electronics & Arduino?

555 Timer & Oscillators Guide ships an update every 5 months, and Learn Electronics & Arduino every 6 days. Most recently, 555 Timer & Oscillators Guide was updated on October 19, 2026 and Learn Electronics & Arduino on October 18, 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.*