# Calendar Z vs IceVault

The clearest difference is ads: IceVault at none against Calendar Z's shown. Calendar Z's advantage is iOS requirement (16.6 vs 26.2). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Calendar Z sells 1 one-off in-app purchase and IceVault sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Calendar Z ships an update every 5 weeks, IceVault monthly. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Calendar Z | IceVault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (723 ratings)](https://appshunter.io/ios/app/calendar-z/id1035515136/reviews)** | — |
| Number of ratings | **723** | — |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 8 MB |
| Requires iOS | **16.6** | 26.2 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [PiyoLog Inc.](https://appshunter.io/developer/440099912) | [Kouichi Abe](https://appshunter.io/developer/295852950) |

## What reviewers say

### Calendar Z

[App page](https://appshunter.io/ios/app/calendar-z/id1035515136)

A straightforward yet powerful calendar application designed for efficient schedule management. It features an integrated reminder system, supports Apple Watch, and offers advanced options for recurring events and event display.

**Highlights:** Integrated reminder system, Apple Watch compatibility, Advanced repeating event setup, Event display on Map, Widget support, Template function for quick event addition, Customizable appearance

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disappear Ads | $1.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- 🎨 Customizable colors and views
- 🗓️ Comprehensive monthly calendar view
- 🔗 Integrates with reminders and other calendars
- 🔍 Clear event details and overview

**What reviewers complain about**

- 🐛 Disappearing past events and data loss
- ⚠️ Sync and compatibility issues with other devices
- 🔍 Difficulty deleting or editing events
- 🗓️ Continuous calendar view can be confusing
- 🔔 Unreliable or missing notifications

**Reported bugs**

- Events disappearing or not saving properly
- Incorrect date/time display and sync issues
- Crashes or freezes after updates
- Compatibility problems with newer iOS versions

**Requested features**

- Ability to view and restore past events
- Improved sync and cross-device functionality
- More customization options for layout and colors
- Easier event management (editing, deleting, repeating)
- Better notification system and controls


### IceVault

[App page](https://appshunter.io/ios/app/icevault-encrypted-database/id1661418945)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IceVault Pro | $24.99 | one-time |


## Frequently asked questions

### Is Calendar Z free?

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

### Is IceVault free?

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

### Do Calendar Z or IceVault have ads?

Calendar Z shows ads; IceVault does not.

### Which is updated more often, Calendar Z or IceVault?

Calendar Z ships an update every 5 weeks, and IceVault monthly. Most recently, Calendar Z was updated on October 15, 2026 and IceVault on October 14, 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.*