# Calendar app *DeepBlack vs Kalos

The clearest difference is in-app purchases: Calendar app *DeepBlack at none against Kalos's 2. Calendar app *DeepBlack also leads on device support (3 vs 1) and iOS requirement (11.0 vs 26.0). Kalos's advantage is update cadence (every 10 days vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Kalos sells 2 in-app purchases, starting at $1.99 per month. Calendar app *DeepBlack asks for nothing beyond the download.

Calendar app *DeepBlack ships an update every 5 months, Kalos every 10 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calendar app *DeepBlack | Kalos |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/calendar-app-deepblack/id1115009429/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 10 MB | 13 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Bakerstreet Co., Ltd.](https://appshunter.io/developer/1090599145) | [Aucreo](https://appshunter.io/developer/6797762231) |

## What reviewers say

### Calendar app *DeepBlack

[App page](https://appshunter.io/ios/app/calendar-app-deepblack/id1115009429)

Organize your schedule with a simple calendar, time, and to-do list. Add tasks and appointments with a touch, and visually distinguish events using customizable color-coding. This app offers a private way to manage your plans without needing to register.

**Highlights:** Daily task and appointment list, Color-coded event decoration, Customizable schedule creation, Private, device-saved plans, Simple touch interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Kalos

[App page](https://appshunter.io/ios/app/kalos/id6797762229)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is Calendar app *DeepBlack free?

Calendar app *DeepBlack is free to download, with no in-app purchases.

### Is Kalos free?

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

### Do Calendar app *DeepBlack or Kalos have ads?

Neither Calendar app *DeepBlack nor Kalos shows ads.

### Which is updated more often, Calendar app *DeepBlack or Kalos?

Calendar app *DeepBlack ships an update every 5 months, and Kalos every 10 days. Most recently, Calendar app *DeepBlack was updated on November 2, 2026 and Kalos on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*