# Construction Calc vs Sparky's CircKit

The clearest difference is price: Sparky's CircKit at Free against Construction Calc's $7.99. Sparky's CircKit also leads on iOS requirement (17.0 vs 26.0). Construction Calc's advantage is in-app purchases (none vs 4). On update cadence, ads and device support there is nothing between them.

Sparky's CircKit is free to download; Construction Calc costs $7.99 up front. Sparky's CircKit sells 4 one-off in-app purchases. Construction Calc asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Construction Calc | Sparky's CircKit |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Positive reviews | — | 84.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Paid |
| Size | 27 MB | 49 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [The Sparky](https://appshunter.io/developer/1747077864) |

## What reviewers say

### Construction Calc

[App page](https://appshunter.io/ios/app/construction-calc/id1551464972)

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

**In-app purchases:** none


### Sparky's CircKit

[App page](https://appshunter.io/ios/app/sparkys-circkit/id6612010334)

This app provides essential electrical calculations and reference tools for electricians, contractors, and engineers. It offers advanced calculators for motor sizing, voltage drop, and more, alongside a professional reference library and built-in productivity tools.

**Highlights:** Motor sizing and protection calculators, Voltage drop calculator, Transformer sizing, Pipe and box fill calculators, Professional reference library, Integrated notes app, Unit converter

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| $1 Tip | $0.99 | one-time |
| $5 Tip | $4.99 | one-time |
| $10 Tip | $9.99 | one-time |
| $20 Tip | $19.99 | one-time |


## Frequently asked questions

### Is Construction Calc free?

Construction Calc costs $7.99, with no in-app purchases.

### Is Sparky's CircKit free?

Sparky's CircKit is free to download, with in-app purchases available.

### Do Construction Calc or Sparky's CircKit have ads?

Neither Construction Calc nor Sparky's CircKit shows ads.

### Which is updated more often, Construction Calc or Sparky's CircKit?

Construction Calc ships an update weekly, and Sparky's CircKit weekly. Most recently, Construction Calc was updated on October 5, 2026 and Sparky's CircKit 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.*