# Shared Calendar . vs ChainASC

The clearest difference is update cadence: ChainASC at every 9 days against Shared Calendar .'s every 4 months. Shared Calendar .'s advantage is iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Shared Calendar . sells 5 in-app purchases, starting at $4.99 per 7 days and ChainASC sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Shared Calendar . ships an update every 4 months, ChainASC every 9 days. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Shared Calendar . | ChainASC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 76 MB | 18 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oleksii Danylenko](https://appshunter.io/developer/6794287354) | [Furkan Kilic](https://appshunter.io/developer/1895067830) |

## What reviewers say

### Shared Calendar .

[App page](https://appshunter.io/ios/app/shared-calendar/id6751322065)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly-Trial | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


### ChainASC

[App page](https://appshunter.io/ios/app/chainasc-habit-tracker/id6762902546)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly! | $0.99 | per month |
| Premium Yearly! | $9.99 | per year |


## Frequently asked questions

### Is Shared Calendar . free?

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

### Is ChainASC free?

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

### Do Shared Calendar . or ChainASC have ads?

Neither Shared Calendar . nor ChainASC shows ads.

### Which is updated more often, Shared Calendar . or ChainASC?

Shared Calendar . ships an update every 4 months, and ChainASC every 9 days. Most recently, Shared Calendar . was updated on October 8, 2026 and ChainASC on October 25, 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.*