# 4 = 1 vs Calco

The clearest difference is update cadence: 4 = 1 at monthly against Calco's every 5 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.

4 = 1 ships an update monthly, Calco every 5 months. The most recent releases landed on September 11, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | 4 = 1 | Calco |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Size | 0 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Zoe Cutler](https://appshunter.io/developer/1616556209) | [Cole Cobb](https://appshunter.io/developer/1795715624) |

## What reviewers say

### 4 = 1

[App page](https://appshunter.io/ios/app/4-1-math-game/id6479671530)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calco

[App page](https://appshunter.io/ios/app/calco-math-game/id6745135298)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 4 = 1 free?

4 = 1 is free to download, with no in-app purchases.

### Is Calco free?

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

### Do 4 = 1 or Calco have ads?

Neither 4 = 1 nor Calco shows ads.

### Which is updated more often, 4 = 1 or Calco?

4 = 1 ships an update monthly, and Calco every 5 months. Most recently, 4 = 1 was updated on September 11, 2026 and Calco on September 15, 2026.

---

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