# picocalc vs Duora

The clearest difference is in-app purchases: Duora at none against picocalc's 1. Duora also leads on ads (none vs shown) and update cadence (every 7 months vs every 31 months). picocalc's advantage is device support (4 vs 2) and iOS requirement (17.6 vs 26.1). On price there is nothing between them.

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

picocalc ships an update every 31 months, Duora every 7 months. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | picocalc | Duora |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/picocalc/id284740333/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 65.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 31 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 6 MB | 58 MB |
| Requires iOS | **17.6** | 26.1 |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [YAVUZ KAAN AKYUZ](https://appshunter.io/developer/1767016040) |

## What reviewers say

### picocalc

[App page](https://appshunter.io/ios/app/picocalc/id284740333)

This app displays a single number on your home screen badge, which can be set, added to, or subtracted from. It's a minimalist tool for quick numerical reminders. Negative numbers and zero are not displayed on the badge.

**Highlights:** Set a number, Add to number, Subtract from number, Home screen badge display, Hides zero and negative numbers

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Duora

[App page](https://appshunter.io/ios/app/duora/id6756139170)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is picocalc free?

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

### Is Duora free?

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

### Do picocalc or Duora have ads?

picocalc shows ads; Duora does not.

### Which is updated more often, picocalc or Duora?

picocalc ships an update every 31 months, and Duora every 7 months. Most recently, picocalc was updated on September 22, 2026 and Duora on September 12, 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.*