# 555 Timer & Oscillators Guide vs AlgoBubbles

The clearest difference is in-app purchases: 555 Timer & Oscillators Guide at none against AlgoBubbles's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AlgoBubbles sells 1 one-off in-app purchase. 555 Timer & Oscillators Guide asks for nothing beyond the download.

555 Timer & Oscillators Guide ships an update every 5 months, AlgoBubbles every 4 months. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 555 Timer & Oscillators Guide | AlgoBubbles |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 4 months** |
| Size | 24 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [hamam alabdulla](https://appshunter.io/developer/1562896225) |

## 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


### AlgoBubbles

[App page](https://appshunter.io/ios/app/algobubbles/id6756498708)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Algorithms | $7.99 | one-time |


## Frequently asked questions

### Is 555 Timer & Oscillators Guide free?

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

### Is AlgoBubbles free?

AlgoBubbles is free to download, with in-app purchases available.

### Do 555 Timer & Oscillators Guide or AlgoBubbles have ads?

Both 555 Timer & Oscillators Guide and AlgoBubbles show ads.

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

555 Timer & Oscillators Guide ships an update every 5 months, and AlgoBubbles every 4 months. Most recently, 555 Timer & Oscillators Guide was updated on October 2, 2026 and AlgoBubbles 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.*