# Electrical Components Quiz vs 555 Timer & Oscillators Guide

The clearest difference is in-app purchases: 555 Timer & Oscillators Guide at none against Electrical Components Quiz's 4. 555 Timer & Oscillators Guide also leads on update cadence (every 5 months vs every 12 months). Electrical Components Quiz's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Electrical Components Quiz sells 4 in-app purchases, starting at $7.99 per 7 days. 555 Timer & Oscillators Guide asks for nothing beyond the download.

Electrical Components Quiz ships an update every 12 months, 555 Timer & Oscillators Guide every 5 months. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Electrical Components Quiz | 555 Timer & Oscillators Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/electrical-components-quiz/id6476490461/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 5 months** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 24 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Electrical Components Quiz

[App page](https://appshunter.io/ios/app/electrical-components-quiz/id6476490461)

Test your knowledge of electrical components with an AI-powered quiz. Progress through levels by correctly identifying over 2000 components. Earn points for correct answers and lose them for incorrect ones.

**Highlights:** AI-powered component identification, Over 2000 electrical components, Level-based progression system, Scoring system for correct/incorrect answers, Retake levels for improvement

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $7.99 | per 7 days |
| Month | $19.99 | per month |
| Year | $29.99 | per year |
| Unlock full access | $5.99 | one-time |


### 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


## Frequently asked questions

### Is Electrical Components Quiz free?

Electrical Components Quiz is free to download, with in-app purchases available.

### Is 555 Timer & Oscillators Guide free?

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

### Do Electrical Components Quiz or 555 Timer & Oscillators Guide have ads?

555 Timer & Oscillators Guide shows ads; Electrical Components Quiz does not.

### Which is updated more often, Electrical Components Quiz or 555 Timer & Oscillators Guide?

Electrical Components Quiz ships an update every 12 months, and 555 Timer & Oscillators Guide every 5 months. Most recently, Electrical Components Quiz was updated on October 4, 2026 and 555 Timer & Oscillators Guide on October 12, 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.*