# Circuit Laboratory HD vs TimeFiler Clock

The clearest difference is price: TimeFiler Clock at Free against Circuit Laboratory HD's $6.99. TimeFiler Clock also leads on update cadence (every 2 months vs every 27 months). Circuit Laboratory HD's advantage is iOS requirement (12.4 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

TimeFiler Clock is free to download; Circuit Laboratory HD costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Circuit Laboratory HD ships an update every 27 months, TimeFiler Clock every 2 months. The most recent releases landed on September 11, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Circuit Laboratory HD | TimeFiler Clock |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 180 MB | 69 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fabrizio Boco](https://appshunter.io/developer/466239616) | [TimeFiler](https://appshunter.io/developer/719788031) |

## What reviewers say

### Circuit Laboratory HD

[App page](https://appshunter.io/ios/app/circuit-laboratory-hd/id1056997109)

This app allows users to design and analyze electronic circuits graphically. It supports various analysis types including DC, AC, multifrequency AC, and transient, with a wide range of components and measuring instruments.

**Highlights:** Graphical circuit design, DC analysis, AC analysis, Multifrequency AC analysis, Transient analysis, Component library, Measuring instruments

**Features:** macOS Compatibility

**In-app purchases:** none


### TimeFiler Clock

[App page](https://appshunter.io/ios/app/timefiler-clock/id1203569866)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Circuit Laboratory HD free?

Circuit Laboratory HD costs $6.99, with no in-app purchases.

### Is TimeFiler Clock free?

TimeFiler Clock is free to download, with no in-app purchases.

### Do Circuit Laboratory HD or TimeFiler Clock have ads?

Neither Circuit Laboratory HD nor TimeFiler Clock shows ads.

### Which is updated more often, Circuit Laboratory HD or TimeFiler Clock?

Circuit Laboratory HD ships an update every 27 months, and TimeFiler Clock every 2 months. Most recently, Circuit Laboratory HD was updated on September 11, 2026 and TimeFiler Clock on September 5, 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.*