Grouping features
All of the teams were involved in this process. We prepared a list of general functionalities that Mudita Pure should have, and then divided them into particular applications and tools.
MuditaOS
Minimalistic, yet powerful
Developing our mobile operating system has been a big challenge in the process of creating Mudita Pure. We came up with a beautifully designed E Ink mobile OS and open-sourced it to fully meet our users’ desire for quality and transparency.
MuditaOS is Open Source
MuditaOS on GitHub
Key features
Beautiful design and usability
Created specifically for Mudita Pure
Desktop app
Open Source
Secure and private
Optimized for E Ink display
Defining the essential functionalities
We divided them into 11 sections that became the fundamentals for building the main functionalities of Mudita Pure:
Home Screen
Calls
Phonebook
Messaging
Settings
Music Player
Alarm Clock
Calendar
Meditation Timer
Tools
Onboarding
User flows
For each application, we prepared a separate diagram, which not only showed the functionalities, but also the connections between them and the possible paths that a user could take.
Finding the perfect interface
The design team at Mudita needed to prepare a visual representation of all the possible actions and a screen for every step that a user would take. This was a long and complicated process that took into account great usability, technical requirements and our love for beautiful design. Usability testing was also a big part of the design process as we wanted to get feedback as soon as possible.
![]()
Minimal
![]()
Modern
![]()
Readable
![]()
Intuitive
Designing for E Ink screen
We tested the E Ink screen and defined the detailed guidelines for further design decisions that would be optimized for this technology. We also wanted the user interface to be intuitive, readable and understandable regardless of the action performed. Our designers were looking for the elements such as the thickness of the lines, sizes of the fonts, or spacing. While testing different styles, using several shades of gray, adding and removing elements, we’ve come to the conclusion that a clear, simple design, using mostly black ink, was the best answer.
We set our expectations high and we now have over 300 screens that meet all of our requirements.
Mudita Center
An extension of MuditaOS
Mudita Center is an additional element of MuditaOS that we’ve been developing simultaneously. It allows us to expand and update the features of Mudita Pure, while using a computer, and keep the phone minimalist at the same time.
What you can do using Mudita Center
Update MuditaOS
Send messages
Import Contacts
Backup & restore Pure's data
Designed with Pure in mind
Optimized for the device
MuditaOS has been designed to be the best performing, E Ink-optimized operating system that fits Mudita Pure perfectly. Building an operating system optimized for a specific device gave us full control over the hardware and enabled getting the best out of its technical specs.
Addressing technical requirements
Every little detail needs to be addressed. We worked on several elements in-house such as: HAL - the Hardware Abstraction Layer between the hardware and the OS, the bootloader, the role of which is to configure the hardware to a level that allows the operating system to boot, a database for storing contact information and messages and a system manager that restores the system after switching on the phone, monitors the system status or performs the initial start-up etc.
Overcoming challenges
The implementation of many services was challenging, especially for the GSM module, which is one of the most complex modules in Mudita Pure. The goal was to create an operating system that is as close to the device as possible, easy to maintain and is not a performance overkill.
E Ink display
The E Ink display is a crucial component that we needed to take into account when developing MuditaOS. We had to make sure that all of the operations are optimized for E Ink and are running smoothly.
Audio system
When working on the audio system, it was important not only to choose the right components, but also to implement an audio service. This way the Harman speaker will play your favorite tunes in MP3, WAV and FLAC formats!
MuditaOS is Open Source
Open Source means transparency, quality and cooperation. These values are with us from day one, so we’re proud to give you a fully open operating system and encourage you to become a part of MuditaOS Open Source community!
We believe that open-sourcing MuditaOS goes along the line of our "You're happy - I'm Happy" philosophy. By opening our minimalistic, yet powerful operating system, we're giving our community the ability to take a look inside, tinker with it, and get creative with building new functionalities or customizing MuditaOS according to their needs.
Open Source is also about quality. More eyes and hands on the code equal more bug fixes and stronger code security. We want our devices to serve their purpose as long as possible, so having an Open Source operating system means longevity and sustainability.
MuditaOS is Open Source. Feel free to contribute and make MuditaOS better for everyone, developers and non-developers alike.
MuditaOS on GitHubMudita OS 1.5.0 - Release date - 20.12.2022
In this release, we have streamlined the process of selecting SIM cards and changing cards PIN numbers. We have added tethering information to the status bar. Also in this release, we provide users in the United States with messaging and calling support using VoLTE technology. Also we added ability to quickly enable and disable functionality in the settings. Moreover we fixed 12 bugs.
Added
Messages: Added text message support via VoLTE modem.
Calls: Call support via VoLTE for users in the US
Home Screen: Added tethering info on status bar.
Changed / Improved
SIM Cards: Change windows flow in SIM settings. Improved support for reinserting the SIM card into the device during SIM setup.
Fixed
General: Fixed MTP integration. Fixed incorrect total CPU usage in logs.
SIM Cards: Fixed disappearing button in PIN entering screen. Restored notifications about PIN changes. Fixed windows flow after PIN mistakes.
Music Player: Fixed music files extensions case sensitivity.
Wallpapers: Fixed locked password wallpaper behavior.
Onboarding: Fixed access to the phone before going onboarding.
Messages: Fixed the phone hanging up after receiving an empty SMS message.
Mudita OS 1.4.0 - Release date - 06.10.2022
In this release, we focused on bugfix. Moreover, we have added basic MMS handling and state refresh when BT automatically turns off.
Added
MMS:
Added basic MMS handling.
Bluetooth:
Added state refresh when BT automatically turns off.
Improved
Calendar:
Added Polish translation to a calendar title.
General:
Changed USB logging.
Improved keyboard responsiveness.
Improved lock screen power consumption.
Bluetooth:
Separated system volume from Bluetooth device volume for A2DP.
Fixed
Fixed
Music Player:
Fixed the issue with music not pausing when the BT device is disconnected.
Fixed music player behavior when connecting/disconnecting audio devices.
Messages:
Fixed issue with message handling in which characters not supported by Pure appear.
Fixed problem with message display on Pure for Verizon network.
Fixed issue with inability to send SMS.
Fixed mixed SMS messages.
SIM Card:
Fixed SIM card pop-ups not showing.
Alarm:
Fixed disappearing manual alarm and vibration volume setting in German.
Hardware:
Fixed an issue with the screen not displaying a message about changing the phone mode from DND/Offline/Connected.
Fixed USB connection/disconnection detection.
Locked screen:
Fixed passcode lock time discrepancy between lock screen and 'Wrong password' popup.
Help:
Fixed lost bytes in logs.
General:
Fixed cellular DMA errors.
Fixed order of the services while closing system.
Fixed removing wrong sentinels.
Fixed crash during phone turn off.
Fixed PLAY label translation in German.
Fixed memory leaks in APN settings.
Fixed poor phone responsiveness.
Fixed crash on entering PIN settings.
Restore:
Fixed crash of the E-ink service while restoring system data.
Calls:
Fixed dropping the call during the DND mode.
Fixed improper duration of the rejected outgoing call shown in calls log.
Fixed turning on loudspeaker before an outgoing call is answered.
Fixed no call log entries in DND mode.
Tethering:
Fixed wrong tethering popup order.
Bluetooth:
Fixed Bluetooth volume control issues.
Fixed Bluetooth state first rendering off.
Contacts:
Fixed crash on importing unprocessable contact.
Fixed the order in which contacts are displayed in the list.
Onboarding:
Fixed incorrect nav text in onboarding for timezone and date time.
Mudita OS 1.3.0 - Release date - 04.08.2022
In this release, we added battery and network status notifications for the Bluetooth Hands-Free Profile. We have added the option to remove all calls from the call list. In Mudita OS version 1.3.0, we have increased Pure's life on battery and moreover improved the stability of the system. We have completed the missing translations for the quotes. Furthermore, we fixed 64 bugs in our system.
Added
Bluetooth: Battery and network status notifications for Hands-Free Profile (HFP).
Call: Option to remove all calls from the call list.
Quotes: Added missing translations.
Changed/Improved
Pure’s life on battery: Reduced USB stack's power consumption. Pure battery life tweaks. Power management improvements.
Call: Updated translations. Improved phone number handling.
Bluetooth: Improved device pairing process. Improved infotainment compatibility.
Contacts: UI change (fonts).
Audio: Improved audio stability.
Fixed
Contacts: Fixed bug of disappearing text while editing contacts.
Bluetooth: Fixed issue of Bluetooth not turning off after 10 minutes of inactivity. Fixed issue with devices appearing in the list of paired devices. Fixed issue with the failure to disconnect the call using the hardware buttons of the BT device. Fixed issue with needing to enter a code when pairing Pure with wireless headphones. Fixed problem with Pure reconnecting to Bluetooth device after disconnecting it. Fixed problem with disconnecting Pure with Bluetooth devices. Fixed problem with switching to the ongoing call screen immediately when connection is in progress.
Call: Fixed problem with rejecting calls using message template. Fixed problem of no audio for incoming calls/messages. Fixed issue with the display of a notification on a call from private number. Fixed problem with the failure to reject an incoming call after selecting a message template. Fixed problem with the failure to finish an outgoing call when it is rejected. Fixed problem with handling calls using a headset.
Music Player: Fixed issue with playback pausing when an unsupported format file appears in the playlist. Fixed problem with unable to resume audio playback after connecting a headset. Fixed problem with phone’s reboots while listening .wav/mp3.
Quotes: Fixed problem of loading quotes when displayed as wallpaper.
UI/UX: Fixed issue with Pure screen refresh after the phone is inactive for a long time.
Pure’s life on battery: Fixed issue with the phone freezing when the battery is very low while charging.
Network: Fixed issues with the phone connecting to the network after turning it on.
Torch: Fixed flashlight shutdown in critical low-power event.
Alarm: Fixed issue with the alarm list not updating after adding a new alarm.
Messages: Fixed functionality of adding contacts from the message screen.
Tethering: Fixed bug of incoming call notifications appearing during tethering. Fixed problem with popup after plugging USB even if no SIM is present.
General: Fixed problem with Pure unlocks after a missed call from favorite contact. Fixed problem with Pure’s freezes on the Onboarding screen. Fixed no refresh of cellular signal bar after startup. Fixed problem with phone spontaneously unlocking when switching from DND to Connected mode. Fixed problem factory reset from bootloader.
SIM Card: Fixed problem with SIM card reading when switching it in settings.
Calendar: Fixed wrong calendar dates.
Notes: Fixed problem with saving notes.
Backup: Fixed problem with restoring the backup.
Keyboard: Fixed problem with keyboard buttons hanging up.
Mudita OS 1.2.1 - Release date - 10.06.2022
In this release, we applied new audio parameters which improved audio quality.
Mudita OS 1.2.0 - Release date - 01.04.2022
In this release, we added Abc input mode support. We have enabled the ability to choose quotes as locked screen wallpaper. Functionality allows us to add your own quotes or periodically draw them from our database. Furthermore, we fixed 90 bugs in our system.
Added
Quotes: Possibility to set periodically drawn quotes as wallpaper - predefined and custom.
Messages: Text writing option - "Abc" mode.
Contacts: Functionality to support the display of long contact names.
General: Extended time for displaying instructions to unlock the device.
Music Player: Extended audio files format support.
Changed/Improved
General: Changed the default text input type from ABC mode to Abc mode.
Fixed
Meditation: Fixed problem with missing gong at beginning and end of meditation process. Fixed issue with setting a time of 0 minutes for meditation. Fixed issue with the inability to delete characters when entering the meditation duration. Fixed problem with missing interval gong in default settings.
Messages: Fixed problem with receiving messages in offline mode. Fixed problem with previewing longer messages as they are entered.
General: Fixed problem with restarting a fully discharged Pure. Fixed a problem with navigating through longer lists available in the system. Fixed problem with no sound for incoming calls/messages. Fixed problem with keyboard stuttering. Fixed problem with the phone hanging up after connecting/disconnecting the USB cable.
Alarm: Fixed problem with alarm turning off when Pure is locked. Fixed problem with alarm going off during active snooze time.
Home Screen: Fixed problem with incorrect display of time on Home Screen. Fixed problem with leaving emergency call dialing screen on locked screen. Fixed problem with keyboard unlock instructions disappearing too quickly. Fixed an issue with unread messages/missed calls appearing on the lock screen when opened.
Settings: Fixed problem with displaying the list of available languages in non-alphabetical order. Fixed problem with wrong order of items - date and time editing screen.
Contacts: Fixed issue with text in other languages being cut off too long. Fixed problem with editing/adding numbers when there is a dash in the phone number. Fixed problem with alphabetical sorting of contacts that do not contain the last name. Fixed problem of being able to edit a deleted contact.
Onboarding: Fixed issue with the text informing about the Mudita OS update that appears during onboarding.
Call: Fixed problem with using call log when more than 900 accounts are loaded. Fixed problem with missing call information from the private number in the notification. Fixed issue with the inability to interrupt an incoming quick call. Fixed translations when adding, editing and deleting contacts from the call log.
Restore: Fixed issue with restoring data on Pure using Mudita Center.
Music Player: Fixed issue with FLAC file playback. Fixed problem with Music Player application crashing when appearing on file with unknown formats. Fixed problem with resuming music playback after connecting a headset.
Pure’s life on battery: Fixed problem of battery discharging of phone without SIM card.
Mudita OS 1.1.6 - Release date - 20.01.2022
In this release, we have changed the speaker equalizer settings. We also fixed critical battery issues. We have solved 4 bugs.
Changed/Improved
Music Player: Changed speaker equalizer settings.
Fixed
Pure’s life on battery: Fixed battery charging critical issues. Fixed critical battery state window getting stuck.
Mudita OS 1.1.5 - Release date - 30.11.2021
In this release, we worked on technical improvements. Furthermore we have solved 13 bugs.
Changed
Bluetooth: The default device name has been changed.
Keyboard: Keyboard backlight settings changed.
UI/UX: Mudita logo display on turned off phone disabled.
Fixed
UI/UX: Fixed design of icons in Calls app.
Battery: Fixed issue with incorrect display of battery status after device restart.
Screen: Fixed issue with the screen backlight turning off too quickly.
Alarm: Fixed problem with inability to set alarm snooze. Fixed problem with data reset when custom alarm settings are entered.
Messages: Fixed problem with receiving messages when phone is offline mode. Fixed errors in text translations.
General: Fixed problem with the incorrect message when trying to enter a PIN code.
Calls: Improved the sound quality of headphones during a phone call over HSP.
Bluetooth: Fixed problem with music playing after disconnecting and reconnecting BT device.
Contacts: Fixed problem with contacts disappearing after editing them.
Mudita OS 1.0.2, Mudita OS 1.0.1 - Release date - 08.11.2021
1.0.2 has the same scope as 1.0.1, we released it due to the minor issue with the version name in 1.0.1.
In this release, we have solved 4 bugs.
Fixed
Contacts: Fixed problem with contacts disappearing after editing them.
General: Fixed problem with MTP on Windows.
Sign up for the Mudita Newsletter and receive 10% off your first order.
If you'd like to receive the best stories from our blog, keep up to date with our progress, and get notified about our product releases and special discounts.