# SD36 Facilities vs Calcu

The clearest difference is update cadence: Calcu at every 3 days against SD36 Facilities's every 2 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.

SD36 Facilities ships an update every 2 months, Calcu every 3 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SD36 Facilities | Calcu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 48 MB | 3 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Surrey School District](https://appshunter.io/developer/634542422) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### SD36 Facilities

[App page](https://appshunter.io/ios/app/sd36-facilities/id1309195479)

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

**In-app purchases:** none


### Calcu

[App page](https://appshunter.io/ios/app/calcu-logarithm/id6698852208)

This app provides advanced logarithmic calculations and explanations, covering equation solving, Taylor series, digit-by-digit computation, and integral definitions. It also simplifies expressions, solves complex logarithmic equations, and includes a virtual slide rule.

**Highlights:** Solves logarithmic equations for y, x, and a, Explains Taylor series for log_e(x), Illustrates digit-by-digit log_10(x) computation, Explains log_e definition via integrals, Simplifies logarithmic expressions, Calculates and graphs complex logarithms, Includes virtual slide rule

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SD36 Facilities free?

SD36 Facilities is free to download, with no in-app purchases.

### Is Calcu free?

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

### Do SD36 Facilities or Calcu have ads?

Neither SD36 Facilities nor Calcu shows ads.

### Which is updated more often, SD36 Facilities or Calcu?

SD36 Facilities ships an update every 2 months, and Calcu every 3 days. Most recently, SD36 Facilities was updated on October 22, 2026 and Calcu on October 24, 2026.

---

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