# dtac OneCall vs MonCalendar

The clearest difference is in-app purchases: dtac OneCall at none against MonCalendar's 3. dtac OneCall also leads on ads (none vs shown) and iOS requirement (15.5 vs 17.6). MonCalendar's advantage is update cadence (every 2 months vs every 13 months) and ratings volume (4 vs 1). On price, rating and device support there is nothing between them.

Both are free to download. MonCalendar sells 3 in-app purchases, starting at $1.99 per month. dtac OneCall asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for dtac OneCall against 5.0 for MonCalendar. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

dtac OneCall ships an update every 13 months, MonCalendar every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | dtac OneCall | MonCalendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/dtac-onecall/id1525846336/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/moncalendar/id6740172947/reviews) |
| Number of ratings | 1 | **4** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 215 MB | 6 MB |
| Requires iOS | **15.5** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TRUE CORPORATION PUBLIC COMPANY LIMITED](https://appshunter.io/developer/447041660) | [Min Site Chan](https://appshunter.io/developer/1012950544) |

## What reviewers say

### dtac OneCall

[App page](https://appshunter.io/ios/app/dtac-onecall/id1525846336)

This cloud-based phone service transforms your devices into a virtual business PBX. It allows you to stay connected for business communications from anywhere, on any device.

**Highlights:** Cloud-based phone service, Virtual business PBX, Mobile and desktop integration, Stay connected anywhere, Full business communication features

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


### MonCalendar

[App page](https://appshunter.io/ios/app/moncalendar/id6740172947)

This app provides a comprehensive Mon calendar system, including traditional dates, lunar calculations, cultural observances, and astrological insights. It offers seamless integration with your iOS Calendar and features a beautiful, intuitive interface for Mon communities worldwide.

**Highlights:** Traditional Mon calendar dates, Lunar calculations and moon phases, Cultural and religious observances, Mon astrological information, iOS Calendar integration, Home Screen widgets (Premium)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Widget Access | $1.99 | per month |
| Yearly Widget Access | $12.99 | per year |
| Lifetime Widget Access | $29.99 | one-time |


## Frequently asked questions

### Is dtac OneCall free?

dtac OneCall is free to download, with no in-app purchases.

### Is MonCalendar free?

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

### Which has better reviews, dtac OneCall or MonCalendar?

dtac OneCall and MonCalendar are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

### Do dtac OneCall or MonCalendar have ads?

MonCalendar shows ads; dtac OneCall does not.

### Which is updated more often, dtac OneCall or MonCalendar?

dtac OneCall ships an update every 13 months, and MonCalendar every 2 months. Most recently, dtac OneCall was updated on November 3, 2026 and MonCalendar on November 4, 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.*