---
title: "OneCalendar Free - All in one calendar — App Overview"
url: https://marlvel.ai/apps/onecalendar-free-all-in-one-calendar
category: Productivity
developer: Hoan Ngo
platforms: ios, android
rating: 4.7 (63.7K ratings)
pricing: free
report_level: overview
generated: 2026-04-30
last_verified: "2026-04-30T09:57:57.666Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** OneCalendar functions as a comprehensive personal organizer that combines calendar management with task tracking and journaling features.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Productivity |
| Rating | 4.7 ★ (63.7K) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 1.6.6 |
| Latest Version (Android) | 6.901.0 |
| Developer | Hoan Ngo |

<!-- SECTION: Summary -->
## What is OneCalendar Free - All in one calendar?

OneCalendar is a multifunctional productivity tool that consolidates scheduling, task management, and personal journaling into a single interface. It integrates with existing iPhone calendars and provides supplementary utilities like weather tracking and photo-supported notes.

<!-- SECTION: Key Features -->
## Key Features

- **Calendar Sync**: Automatically synchronizes with all existing iPhone calendars for centralized scheduling.
- **To-do List**: Provides a dedicated space for users to manage and track their daily tasks.
- **Diary with Photos**: Allows users to create personal diary entries that support photo attachments.
- **Weather Integration**: Displays weather information directly within the application interface.

<!-- SECTION: Target Audience -->
## Who is it for?

Users seeking an all-in-one organizational hub to manage daily schedules, tasks, and personal records.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/onecalendar-free-all-in-one-calendar/id1127164793?uo=4)
- [Google Play](https://play.google.com/store/apps/details?id=biz.codespark.xcalendarapp&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/onecalendar-free-all-in-one-calendar)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/onecalendar-free-all-in-one-calendar).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*