# Calctan vs Zebble

The clearest difference is in-app purchases: Zebble at none against Calctan's 1. Zebble also leads on update cadence (weekly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Calctan sells 1 one-off in-app purchase. Zebble asks for nothing beyond the download.

Calctan ships an update every 3 months, Zebble weekly. The most recent releases landed on October 29, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Calctan | Zebble |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews)** | — |
| Number of ratings | **61** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 8 MB | 32 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [HUIZHOU REDBOX ELECTRONICS CO,.LTD](https://appshunter.io/developer/1693036399) |

## What reviewers say

### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

**Highlights:** Smart formula workspace with direct cursor editing, Advanced scientific engine with true order of operations, Auditable calculation history on a digital tape, Exportable reports via AirPrint and PDF, Multitasking support for iPad, iCloud synchronization across devices, Private and ad-free experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.99 | one-time |


### Zebble

[App page](https://appshunter.io/ios/app/zebble/id6748891593)

**In-app purchases:** none


## Frequently asked questions

### Is Calctan free?

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

### Is Zebble free?

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

### Do Calctan or Zebble have ads?

Neither Calctan nor Zebble shows ads.

### Which is updated more often, Calctan or Zebble?

Calctan ships an update every 3 months, and Zebble weekly. Most recently, Calctan was updated on October 29, 2026 and Zebble on October 16, 2026.

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