# Alt Viewer vs yottey(ヨッティ)：日めくりカレンダー

The clearest difference is in-app purchases: Alt Viewer at none against yottey(ヨッティ)：日めくりカレンダー's 1. yottey(ヨッティ)：日めくりカレンダー's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. yottey(ヨッティ)：日めくりカレンダー sells 1 in-app purchase, starting at $1.99 per month. Alt Viewer asks for nothing beyond the download.

Alt Viewer ships an update every 3 months, yottey(ヨッティ)：日めくりカレンダー every 5 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Alt Viewer | yottey(ヨッティ)：日めくりカレンダー |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 83 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [COMMUNICATION BUSINESS AVENUE INC.](https://appshunter.io/developer/1098159758) | [SOFT DEVICE INC.](https://appshunter.io/developer/1457647052) |

## What reviewers say

### Alt Viewer

[App page](https://appshunter.io/ios/app/alt-viewer/id1669436969)

**Features:** macOS Compatibility, Safari Extension

**In-app purchases:** none


### yottey(ヨッティ)：日めくりカレンダー

[App page](https://appshunter.io/ios/app/yottey/id6569222065)

This app functions as a digital daily calendar, clearly displaying the current date and scheduled events. It was developed to assist individuals experiencing "time orientation disorder," a symptom often seen in the early stages of dementia, helping them track dates, days, and times.

**Highlights:** Daily calendar display, Event scheduling, Assists with time orientation disorder, Clear date and time visibility, Designed for dementia support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ヶ月自動更新 | $1.99 | per month |


## Frequently asked questions

### Is Alt Viewer free?

Alt Viewer is free to download, with no in-app purchases.

### Is yottey(ヨッティ)：日めくりカレンダー free?

yottey(ヨッティ)：日めくりカレンダー is free to download, with in-app purchases available.

### Do Alt Viewer or yottey(ヨッティ)：日めくりカレンダー have ads?

Neither Alt Viewer nor yottey(ヨッティ)：日めくりカレンダー shows ads.

### Which is updated more often, Alt Viewer or yottey(ヨッティ)：日めくりカレンダー?

Alt Viewer ships an update every 3 months, and yottey(ヨッティ)：日めくりカレンダー every 5 months. Most recently, Alt Viewer was updated on October 27, 2026 and yottey(ヨッティ)：日めくりカレンダー on October 30, 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.*