ZenDay: Calendar, Tasks, To-do

Be better organized with ZenDay: your calendars, tasks & to-dos in a 3D timeline

MobiSysteme · com.mobisysteme.zime

Not rated yet 100K+ downloads v3.0.4 4 MB Android 5.0+ PEGI 3 · Everyone

Download APK 4 MB All versions

Signature matches the Google Play version Details

Watch the ZenDay: Calendar, Tasks, To-do trailer on YouTube

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At a glance

Latest version: v3.0.4 (6038)
Updated: Sep 2, 2026 (1 month ago)
APK size: 4 MB
Requires: Android 5.0+ (API 21)
CPU support: Any (no native code)
Graphics: OpenGL ES 2.0+
Category: Productivity (app)
Listed since: Mar 17, 2021 (at least)
Permissions: 15 (5 sensitive)
Website: zenday-app.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

ZenDay: Calendar, Tasks, To-do is an app by MobiSysteme in the Productivity category, listed since at least March 2021. It has no native code, so it runs on any Android processor.

Since version 2.5.0, the APK shrank from 4.8 MB to 4 MB and the minimum Android version rose from 4.1 to 5.0. It asks for 15 permissions, 5 of them sensitive, including read contacts, find accounts on the device and read calendar. It asks for the same permissions as version 3.0.3.

What's new in v3.0.4

- Fixed account sync option in settings (occurred on recent android devices) - Improved stability

Description

From the listing uploaded by “appupdater”.

ZenDay: Plan smarter. Live better. ZenDay helps you stay organized, improve your work/life balance, and fight procrastination — all in a beautifully fluid, 3D timeline. Forget endless task lists. Start managing your time instead. ZenDay schedules your tasks directly into your day based on your real availability, using customizable Time Slots. No more fake calendar events — just real planning that adapts to your life. Your tasks float forward with time. If you don’t complete them, ZenDay reschedules them automatically. Upcoming and overdue tasks change color, so you can take action before it’s too late. With new Quick Actions, you can instantly add preset actions to any task or event. Use multiple task lists, each with their own Time Slots, to keep your work and personal life in sync. You can even self-evaluate your activity to track your progress over time. All of this happens in a unique 3D view that feels like a GPS for your time — helping you move forward, toward your goals. Key Features • Smart scheduling of tasks and meetings • Automatic rescheduling as time moves forward • Multiple task lists with custom Time Slots • Quick Actions for faster task entry • Improved self-evaluation and weekly debriefing • Syncs with all your calendars • Intuitive 3D timeline: zoom, scroll, focus • Clean, modern interface ZenDay is not just another planner — it’s your personal time assistant. Requires Android 5.0 and up 🚫 Tablet support has been removed in this version. *** Featured on Samsung's S Suggest *** *** Featured on Google Play: App to watch, Play Pick *** *** Selected by Google India as Best App for Everyday Life for 2013 *** http://bitly.com/zenday-indiatimes

Version history

4 versions are listed, going back to v2.5.0. Since v3.0.2 it requires Android 5.0+.

v3.0.4 LATEST Sep 2, 2026 4 MB TRUSTED v3.0.3 Oct 4, 2025 4 MB TRUSTED v3.0.2 Sep 29, 2025 4 MB TRUSTED v2.5.0 Mar 11, 2025 4.8 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 2, 2026.
Certificate issued to “MobiSysteme” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Sep 2, 2026
Validated against Google Play Sep 2, 2026
Signed byCN=Richard Phan, OU=MobiSysteme, O=MobiSysteme, L=Annecy-le-Vieux, ST=Unknown, C=FR
Signing certificate (SHA-1)EE:87:8D:CF:9E:0E:71:5F:06:52:29:FE:D7:5A:EF:EF:FC:35:5F:15
File MD5db37e057bf2c4d3a8c075cb9b7c0fb95
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (15)

ZenDay: Calendar, Tasks, To-do requests 15 permissions, 5 of them sensitive.

Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
Read calendar Sensitive android.permission.READ_CALENDAR
Read contacts Sensitive android.permission.READ_CONTACTS
Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
Write calendar Sensitive android.permission.WRITE_CALENDAR
Control vibration android.permission.VIBRATE
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) com.mobisysteme.zime.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Manage accounts android.permission.MANAGE_ACCOUNTS
Read sync settings android.permission.READ_SYNC_SETTINGS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE
Write sync settings android.permission.WRITE_SYNC_SETTINGS

Required hardware & features

Basic touch input android.hardware.faketouch
Landscape screen android.hardware.screen.landscape
Portrait screen android.hardware.screen.portrait

ZenDay: Calendar, Tasks, To-do APK: questions and answers

Is there a version of ZenDay: Calendar, Tasks, To-do for older Android phones?

The current version needs Android 5.0 or later. Version 2.5.0 is the newest listed build that installs on Android 4.1 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 2.5.0 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the ZenDay: Calendar, Tasks, To-do APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is db37e057bf2c4d3a8c075cb9b7c0fb95.