# Calcifon vs Notes and Keys(Notes & Keys)

The clearest difference is in-app purchases: Notes and Keys(Notes & Keys) at none against Calcifon's 2. Notes and Keys(Notes & Keys) also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Calcifon sells 2 in-app purchases, starting at $1.99 per month. Notes and Keys(Notes & Keys) asks for nothing beyond the download.

Calcifon ships an update every 2 months, Notes and Keys(Notes & Keys) fortnightly. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Calcifon | Notes and Keys(Notes & Keys) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcifon/id1641658581/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 41 MB | 34 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KauriLab Inc.](https://appshunter.io/developer/530847194) | [Calpine Labs Private Limited](https://appshunter.io/developer/1039747246) |

## 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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $1.99 | per month |
| Premium (1 year) | $19.99 | per year |


### Notes and Keys(Notes & Keys)

[App page](https://appshunter.io/ios/app/notes-and-keysnotes-and-keys/id6740842077)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calcifon free?

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

### Is Notes and Keys(Notes & Keys) free?

Notes and Keys(Notes & Keys) is free to download, with no in-app purchases.

### Do Calcifon or Notes and Keys(Notes & Keys) have ads?

Neither Calcifon nor Notes and Keys(Notes & Keys) shows ads.

### Which is updated more often, Calcifon or Notes and Keys(Notes & Keys)?

Calcifon ships an update every 2 months, and Notes and Keys(Notes & Keys) fortnightly. Most recently, Calcifon was updated on October 9, 2026 and Notes and Keys(Notes & Keys) on October 16, 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.*