# 555 Timer & Oscillators Guide vs Belden Academy

The clearest difference is ads: Belden Academy at none against 555 Timer & Oscillators Guide's shown. Belden Academy also leads on update cadence (daily vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

555 Timer & Oscillators Guide ships an update every 5 months, Belden Academy daily. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 555 Timer & Oscillators Guide | Belden Academy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Daily** |
| Size | 24 MB | 56 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Belden Inc.](https://appshunter.io/developer/1113992974) |

## 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


### Belden Academy

[App page](https://appshunter.io/ios/app/belden-academy/id6757923743)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 555 Timer & Oscillators Guide free?

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

### Is Belden Academy free?

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

### Do 555 Timer & Oscillators Guide or Belden Academy have ads?

555 Timer & Oscillators Guide shows ads; Belden Academy does not.

### Which is updated more often, 555 Timer & Oscillators Guide or Belden Academy?

555 Timer & Oscillators Guide ships an update every 5 months, and Belden Academy daily. Most recently, 555 Timer & Oscillators Guide was updated on October 19, 2026 and Belden Academy on October 9, 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.*