# SEC Calculator vs Clockwork Education

The clearest difference is update cadence: Clockwork Education at every 8 months against SEC Calculator's every 27 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SEC Calculator ships an update every 27 months, Clockwork Education every 8 months. The most recent releases landed on October 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | SEC Calculator | Clockwork Education |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 32 MB | 35 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Star Refrigeration Ltd](https://appshunter.io/developer/1571289922) | [Clockwork Education Ltd](https://appshunter.io/developer/1626982482) |

## What reviewers say

### SEC Calculator

[App page](https://appshunter.io/ios/app/sec-calculator/id1571289919)

This tool assists businesses in assessing energy usage and cost reduction through equipment improvements or new system investments. It calculates potential annual savings and CO2 emission reductions, benchmarks sites against best practices, and generates a personalized PDF report.

**Highlights:** Energy usage assessment, Cost reduction calculation, CO2 emission reduction tracking, Site benchmarking, Personalized PDF reports

**Features:** macOS Compatibility

**In-app purchases:** none


### Clockwork Education

[App page](https://appshunter.io/ios/app/clockwork-education/id1626982480)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SEC Calculator free?

SEC Calculator is free to download, with no in-app purchases.

### Is Clockwork Education free?

Clockwork Education is free to download, with no in-app purchases.

### Do SEC Calculator or Clockwork Education have ads?

Neither SEC Calculator nor Clockwork Education shows ads.

### Which is updated more often, SEC Calculator or Clockwork Education?

SEC Calculator ships an update every 27 months, and Clockwork Education every 8 months. Most recently, SEC Calculator was updated on October 1, 2026 and Clockwork Education on September 10, 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.*