# 99캘린더 vs Piece Day

The clearest difference is price: Piece Day at Free against 99캘린더's $1.99. 99캘린더's advantage is update cadence (every 4 days vs every 11 days). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Piece Day is free to download; 99캘린더 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

99캘린더 ships an update every 4 days, Piece Day every 11 days. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 99캘린더 | Piece Day |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Size | 5 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HWAN LEE](https://appshunter.io/developer/1867174500) | [Warm Tech Company](https://appshunter.io/developer/1895279095) |

## What reviewers say

### 99캘린더

[App page](https://appshunter.io/ios/app/99/id6760467468)

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

**In-app purchases:** none


### Piece Day

[App page](https://appshunter.io/ios/app/piece-day/id6792414283)

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

**In-app purchases:** none


## Frequently asked questions

### Is 99캘린더 free?

99캘린더 costs $1.99, with no in-app purchases.

### Is Piece Day free?

Piece Day is free to download, with no in-app purchases.

### Do 99캘린더 or Piece Day have ads?

Neither 99캘린더 nor Piece Day shows ads.

### Which is updated more often, 99캘린더 or Piece Day?

99캘린더 ships an update every 4 days, and Piece Day every 11 days. Most recently, 99캘린더 was updated on October 25, 2026 and Piece Day on October 8, 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.*