# Electronics Tools & Calc Pro vs 555 Timer & Oscillators Pro

Electronics Tools & Calc Pro and 555 Timer & Oscillators Pro are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Electronics Tools & Calc Pro 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 Tools & Calc Pro ships an update every 5 months, 555 Timer & Oscillators Pro every 3 months. The most recent releases landed on September 27, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Electronics Tools & Calc Pro | 555 Timer & Oscillators Pro |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/electronics-tools-and-calc-pro/id1581668963/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 58 MB | 22 MB |
| Requires iOS | **15.0** | 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 Tools & Calc Pro

[App page](https://appshunter.io/ios/app/electronics-tools-and-calc-pro/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 Tools & Calc Pro free?

Electronics Tools & Calc Pro 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 Tools & Calc Pro or 555 Timer & Oscillators Pro have ads?

Neither Electronics Tools & Calc Pro nor 555 Timer & Oscillators Pro shows ads.

### Which is updated more often, Electronics Tools & Calc Pro or 555 Timer & Oscillators Pro?

Electronics Tools & Calc Pro ships an update every 5 months, and 555 Timer & Oscillators Pro every 3 months. Most recently, Electronics Tools & Calc Pro was updated on September 27, 2026 and 555 Timer & Oscillators Pro on September 24, 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.*