# Electronics docs & calculators vs 555 Timer & Oscillators Pro

The clearest difference is iOS requirement: Electronics docs & calculators at 13.0 against 555 Timer & Oscillators Pro's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Electronics docs & calculators costs $4.99 and 555 Timer & Oscillators Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Electronics docs & calculators ships an update every 6 months, 555 Timer & Oscillators Pro every 3 months. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Electronics docs & calculators | 555 Timer & Oscillators Pro |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/electronics-docs-and-calculators/id1581668963/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 49 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Electronics docs & calculators

[App page](https://appshunter.io/ios/app/electronics-docs-and-calculators/id1581668963)

This app serves as a pocket electronics lab, offering a comprehensive reference for components and circuits. It simplifies complex calculations for filters, inductors, and various circuit configurations, aiding engineers and hobbyists in their designs.

**Highlights:** Electronic component reference, Electronic circuit reference, Filter calculation tools, Inductor winding calculators, Resistor and capacitor calculations, Ohm's Law calculator, AC/DC power calculations

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

**In-app purchases:** none


### 555 Timer & Oscillators Pro

[App page](https://appshunter.io/ios/app/555-timer-and-oscillators-pro/id6504415162)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Electronics docs & calculators free?

Electronics docs & calculators costs $4.99, with no in-app purchases.

### Is 555 Timer & Oscillators Pro free?

555 Timer & Oscillators Pro costs $4.99, with no in-app purchases.

### Do Electronics docs & calculators or 555 Timer & Oscillators Pro have ads?

Neither Electronics docs & calculators nor 555 Timer & Oscillators Pro shows ads.

### Which is updated more often, Electronics docs & calculators or 555 Timer & Oscillators Pro?

Electronics docs & calculators ships an update every 6 months, and 555 Timer & Oscillators Pro every 3 months. Most recently, Electronics docs & calculators was updated on September 9, 2026 and 555 Timer & Oscillators Pro on September 21, 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.*