# Calndars vs Messo

The clearest difference is price: Messo at Free against Calndars's $3.99. Messo also leads on update cadence (every 4 days vs every 5 weeks) and iOS requirement (17.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Messo is free to download; Calndars costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calndars ships an update every 5 weeks, Messo every 4 days. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Calndars | Messo |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calndars/id1481775085/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Paid | — |
| Size | 6 MB | 81 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Geert Jadoul](https://appshunter.io/developer/458883064) | [Stas Morozov](https://appshunter.io/developer/541842204) |

## What reviewers say

### Calndars

[App page](https://appshunter.io/ios/app/calndars/id1481775085)

Effortlessly convert dates between over 30 major calendar systems, including Gregorian, Islamic, and Chinese. This utility is designed for global professionals and researchers needing precise cross-cultural date translations. Integrates with widgets and Shortcuts for seamless workflow.

**Highlights:** Convert dates across 30+ calendar systems, Supports Gregorian, Islamic, Chinese, Hebrew, Persian, and more, Native experience on iPhone, iPad, Mac, Apple Watch, Customizable widgets, Shortcuts integration, AppleScript support on macOS

**In-app purchases:** none


### Messo

[App page](https://appshunter.io/ios/app/messo-to-do-notes-tasks/id6758547513)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calndars free?

Calndars costs $3.99, with no in-app purchases.

### Is Messo free?

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

### Do Calndars or Messo have ads?

Neither Calndars nor Messo shows ads.

### Which is updated more often, Calndars or Messo?

Calndars ships an update every 5 weeks, and Messo every 4 days. Most recently, Calndars was updated on October 6, 2026 and Messo on October 9, 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.*