# FirstSeed Calendar vs AIrClock

The clearest difference is ads: AIrClock at none against FirstSeed Calendar's shown. FirstSeed Calendar's advantage is device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. FirstSeed Calendar sells 2 in-app purchases, starting at $2.99 per month and AIrClock sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

FirstSeed Calendar ships an update every 8 days, AIrClock every 9 days. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | FirstSeed Calendar | AIrClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (336 ratings)](https://appshunter.io/ios/app/firstseed-calendar/id1321260278/reviews)** | — |
| Number of ratings | **336** | — |
| Positive reviews | 80.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 3 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FirstSeed Inc](https://appshunter.io/developer/1321260277) | [kazuaki morooka](https://appshunter.io/developer/6788705137) |

## What reviewers say

### FirstSeed Calendar

[App page](https://appshunter.io/ios/app/firstseed-calendar/id1321260278)

A powerful scheduling app that manages both events and reminders. It offers innovative calendar views, interactive widgets for various iOS versions, and seamless syncing with Apple's Calendar and Reminders apps. An optional paid upgrade unlocks advanced features like natural language event processing and drag-and-drop functionality.

**Highlights:** Interactive and lock-screen widgets, Full-featured month, week, and list views, Event and reminder management, Natural language event processing (paid), Drag & drop event manipulation (paid), Apple Watch support, Syncs with Apple Calendar and Reminders

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Donation | $2.99 | per month |
| Pro Version | $9.99 | one-time |


### AIrClock

[App page](https://appshunter.io/ios/app/airclock/id6790003094)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム月額プラン | $1.99 | per month |
| プレミアム年額プラン | $19.99 | per year |


## Frequently asked questions

### Is FirstSeed Calendar free?

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

### Is AIrClock free?

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

### Do FirstSeed Calendar or AIrClock have ads?

FirstSeed Calendar shows ads; AIrClock does not.

### Which is updated more often, FirstSeed Calendar or AIrClock?

FirstSeed Calendar ships an update every 8 days, and AIrClock every 9 days. Most recently, FirstSeed Calendar was updated on October 27, 2026 and AIrClock on October 10, 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.*