# Zip vs Rhythmetic Calculator

The clearest difference is iOS requirement: Zip at 13.0 against Rhythmetic Calculator's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Zip sells 2 one-off in-app purchases and Rhythmetic Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Zip ships an update every 2 weeks, Rhythmetic Calculator every 3 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Zip | Rhythmetic Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 4 MB | 19 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Techno-Grafik Christian Lackner eU](https://appshunter.io/developer/408396518) | [Tomorrow Source, LLC](https://appshunter.io/developer/1859103478) |

## What reviewers say

### Zip

[App page](https://appshunter.io/ios/app/zip-share/id1491885590)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free Trial | Free | one-time |
| Unlock Zip-Share | $4.99 | one-time |


### Rhythmetic Calculator

[App page](https://appshunter.io/ios/app/rhythmetic-calculator/id6767287282)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rhythmetic Pro | $3.99 | one-time |


## Frequently asked questions

### Is Zip free?

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

### Is Rhythmetic Calculator free?

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

### Do Zip or Rhythmetic Calculator have ads?

Neither Zip nor Rhythmetic Calculator shows ads.

### Which is updated more often, Zip or Rhythmetic Calculator?

Zip ships an update every 2 weeks, and Rhythmetic Calculator every 3 weeks. Most recently, Zip was updated on October 25, 2026 and Rhythmetic Calculator on October 31, 2026.

---

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