# Sigma Utils vs Concrete Calculator

The clearest difference is in-app purchases: Sigma Utils at none against Concrete Calculator's 1. Sigma Utils also leads on update cadence (every 8 days vs every 3 months) and iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Concrete Calculator sells 1 one-off in-app purchase. Sigma Utils asks for nothing beyond the download.

Sigma Utils ships an update every 8 days, Concrete Calculator every 3 months. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Sigma Utils | Concrete Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Size | 57 MB | 39 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SIGMA COMPUTERS](https://appshunter.io/developer/1587103930) | [Shital Gorasiya](https://appshunter.io/developer/1737199158) |

## What reviewers say

### Sigma Utils

[App page](https://appshunter.io/ios/app/sigma-utils/id6503425116)

**Features:** macOS Compatibility

**In-app purchases:** none


### Concrete Calculator

[App page](https://appshunter.io/ios/app/concrete-calculator-solidmix/id6751228843)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $4.99 | one-time |


## Frequently asked questions

### Is Sigma Utils free?

Sigma Utils is free to download, with no in-app purchases.

### Is Concrete Calculator free?

Concrete Calculator is free to download, with in-app purchases available.

### Do Sigma Utils or Concrete Calculator have ads?

Neither Sigma Utils nor Concrete Calculator shows ads.

### Which is updated more often, Sigma Utils or Concrete Calculator?

Sigma Utils ships an update every 8 days, and Concrete Calculator every 3 months. Most recently, Sigma Utils was updated on October 27, 2026 and Concrete Calculator on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*