# Goldbach's Conjecture vs Modulo Calculator.

The clearest difference is price: Modulo Calculator. at Free against Goldbach's Conjecture's $0.99. Goldbach's Conjecture's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Modulo Calculator. is free to download; Goldbach's Conjecture costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Goldbach's Conjecture ships an update every 8 months, Modulo Calculator. every 4 months. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Goldbach's Conjecture | Modulo Calculator. |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 4 months** |
| Size | 34 MB | 29 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad, Mac | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Milos Lukas Ziolkowski](https://appshunter.io/developer/1778486821) |

## What reviewers say

### Goldbach's Conjecture

[App page](https://appshunter.io/ios/app/goldbachs-conjecture/id1385243580)

**In-app purchases:** none


### Modulo Calculator.

[App page](https://appshunter.io/ios/app/modulo-calculator/id6737914141)

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

**In-app purchases:** none


## Frequently asked questions

### Is Goldbach's Conjecture free?

Goldbach's Conjecture costs $0.99, with no in-app purchases.

### Is Modulo Calculator. free?

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

### Do Goldbach's Conjecture or Modulo Calculator. have ads?

Modulo Calculator. shows ads; Goldbach's Conjecture does not.

### Which is updated more often, Goldbach's Conjecture or Modulo Calculator.?

Goldbach's Conjecture ships an update every 8 months, and Modulo Calculator. every 4 months. Most recently, Goldbach's Conjecture was updated on October 3, 2026 and Modulo Calculator. on October 9, 2026.

---

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