# Calcifon vs DutyCal

The clearest difference is monetization model: Calcifon at freemium against DutyCal's subscription. DutyCal's advantage is update cadence (every 4 days vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Calcifon sells 2 in-app purchases, starting at $2.19 per month and DutyCal sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Calcifon against 5.0 for DutyCal. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Calcifon ships an update every 2 months, DutyCal every 4 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calcifon | DutyCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/calcifon/id1641658581/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/dutycal/id6775201275/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | **Freemium** | Subscription |
| Size | 31 MB | 11 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KauriLab](https://appshunter.io/developer/530847194) | [Rushabh Soni](https://appshunter.io/developer/1862376071) |

## What reviewers say

### Calcifon

[App page](https://appshunter.io/ios/app/calcifon/id1641658581)

This multiplatform calendar app offers a simple and intuitive way to manage your schedule. It syncs with iOS and Google Calendars, allowing for easy event rescheduling and organization with color-coding. Premium features unlock additional views and customization options.

**Highlights:** Simple and intuitive interface, Drag & drop rescheduling, Color-coded events, Automatic sync with iOS and Google Calendar, Monthly & Daily schedule views (Premium), iPad and Mac app support (Premium), Customizable background image (Premium)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $2.19 | per month |
| Premium (1 year) | $21.99 | per year |


### DutyCal

[App page](https://appshunter.io/ios/app/dutycal/id6775201275)

This app syncs your flight schedule from your crew portal to your iPhone Calendar and provides a printable monthly overview for your family. It offers weather updates, pre-departure alarms, and a pay estimate, all while prioritizing user privacy.

**Highlights:** Roster sync to iPhone Calendar, Printable monthly overview sheet, Weather updates for flights, Pre-departure alarms, Monthly pay estimate, Logbook data import, FAR 117 compliance tracking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DutyCal Monthly | $9.99 | per month |
| DutyCal Yearly | $99.99 | per year |


## Frequently asked questions

### Is Calcifon free?

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

### Is DutyCal free?

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

### Which has better reviews, Calcifon or DutyCal?

Calcifon and DutyCal are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Calcifon or DutyCal have ads?

Neither Calcifon nor DutyCal shows ads.

### Which is updated more often, Calcifon or DutyCal?

Calcifon ships an update every 2 months, and DutyCal every 4 days. Most recently, Calcifon was updated on November 12, 2026 and DutyCal on October 31, 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.*