UI Themer

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UI Themer lets customize icons, fonts and pixel density in Sailfish OS.

Read before installing

  • For Sailfish OS 2.1 and above.
  • It requires Theme pack support to be installed.
  • Refresh the homescreen to apply settings.
  • Remember to restore default icons and fonts before performing a system upgrade.
  • For Sailfish X users: changing device pixel ratio needs testing.

UI Themer


  • Icon theming.
  • Font theming.
  • Change device pixel ratio.
  • Change DPI for Alien Dalvik.
  • Recovery tools.
  • Auto-update icon theme.

Create custom theme packs

Documentation on how to create theme packs available here.


Languages supported:

Request a new language or contribute to existing languages on the Transifex project page.

Usage guide

A usage guide is available here.


Roadmap and features will be tracked on the Trello dashboard.


Thanks to Dax89 and luca247 for support and patience!


If you like my work, please consider to donate via PayPal.


* Tue Oct 16 2018 1.0.5
- Compatibility with Theme pack support 0.6.1.

* Fri Feb 23 2018 1.0.4
- Tools page.
- Recovery page.
- Placeholder if no themes installed.
- Uninstall themes fixed.
- Translations updated.

* Wed Feb 21 2018 1.0.3
- Preliminary icon size for Sailfish X (needs further testing).
- One-click restore.

* Mon Feb 19 2018 1.0.2
- Translations updated.

* Wed Nov 15 2017 1.0.1
- Auto-updater fixed.

* Tue Oct 24 2017 1.0.0
- Major UI rewrite.
- Translations updated.

* Fri Oct 20 2017 0.7.1
- Minor fixes.

* Fri Oct 20 2017 0.7.0
- UI overhaul.

* Sun Oct 15 2017 0.6.6
- Fixed UI freezes.
- Translations updated.

* Thu Jul 13 2017 0.6.5
- Fixed restart homescreen toggle.
- Performance improvements.
- More Icon updater options.
- Translations updated.

* Wed Jul 12 2017 0.6.4
- Dynamic UI elements.
- Restart after applying/restoring toggle.

* Tue Jul 11 2017 0.6.3
- Font preview.
- Theme page redesign.
- Icon updater redesign.
- About page redesign.
- Display density page redesign.
- Tools page redesign.
- Side panel.
- Added Spanish translation (thanks to mad_soft).

* Tue Jul 4 2017 0.6.2
- Display density page polished.
- Icon updater page polished.
- Translations updated.

* Sat Jul 1 2017 0.6.1
- Added auto-update icons option.

* Thu Jun 29 2017 0.6.0
- Recovery tools added.

* Sat Apr 22 2017 0.5.9
- Notifications added
- Dutch translation updated.

* Sat Apr 22 2017 0.5.6
- Added Dutch translation (thanks to Nathan Follens).
- Added German translation (thanks to Sailfishman).

* Thu Apr 18 2017 0.5.5
- Added Polish translation (thanks to Tomasz Amborski).

* Tue Apr 18 2017 0.5.4
- Minor fixes.

* Sat Apr 15 2017 0.5.3
- Minor fixes.

* Sat Apr 15 2017 0.5.2
- Android DPI settings.
- Compatibility with Theme pack support 0.3.3.

* Sat Apr 15 2017 0.5.1
- Bug fix.
- Compatibility with Theme pack support 0.3.2.


smatkovi's picture

Where did you get the meego themepack?

DameCENO's picture

Hi fravaccaro
The most recent software update seems to have broken something in UI themer as it can't no longer apply fonts, after selecting the font, it rotates indefinitely . Have gone through all the usual steps, un installed and re installed it, pkcon refresh, nothing works. Themepack support works great for fonts, but not for pixel ratio. Am out of ideas. So sorry for always asking for help after system upgrade

fravaccaro's picture

Have you reinstalled the default fonts via the Tools page?

DameCENO's picture

Yes I have, as well as reinstalling default Sailfish fonts from terminal uninstalling and reinstalling both ui themer and themepacksupport.
I can apply fonts but only via themepacksupport, via UI themer it keeps loading for ever without any effects. Pixel density ratio on the other hand, not even themepacksupport can help with it...

fravaccaro's picture

Which font did you use? 

DameCENO's picture

I am so sorry, I am actually only seeing this reply just now.

I use gasptown and handy as my main fonts rarely use the others.

Strangely enough this new version fixes the pixel density option which now works flawlessly but still can't apply fonts, forever rotating but unable to apply the font and restart the homescreen. The option to restart the homescreen in UI Themer works very well to be clear, but just can't apply fonts on my Jolla 1. I am about to try and run themepacksupport via terminal and see if I can apply the font from there as it worked well for fonts till now

DameCENO's picture

Just used themepacksupport to apply handy font which worked quite well, but now even the pixel ratio in UI Themer that worked just now, no longer works. I am so sad that I always have so many challenges with my favorite tweaking tool, It's not fair


UPdate: Reinstalling default Sailfsh fonts from themepacksupport solved the fonts applying issue in UI Themer, but sadly the pixel density ratio is still broken.

I tried to run the dconf reset command as you instructed earlier here but I get a permission denied error as cannot create /user/... something. Worthy of note, I use a mount service for my home and android storage on my memory card. It can't be the issue for I have always used this in the past with UI Themer and it always worked. Any assistance would be so appreciated, I maintain what I said my device isn't complete without this app


What format is accepted to change the pixel density value in themepacksupport in terminal? 0.9 0/9 0,9 ? I think because I am not sure how I can't try to change it there to see if it works and report back

fravaccaro's picture

Honestly I'm not aware of those fonts. The correct format is 0.9.

Usually reinstalling both themepacksupport and UI Themer fixes the issues you reported.

DameCENO's picture

Thanks so much for your reply, means a lot to me.
I have tried all fonts with the same effect, 0.9. Well I will give it a try in themepacksupport, and uninstalling and re-installing both UI Themer and themepacksupport and report back

fravaccaro's picture

Don't forget to reinstall fonts before trying again.

DameCENO's picture

OH!!! I didn't think of that, those fonts will be uninstalled as well... pkcon comfirmed it as well as themepack support wouldn't be uninstlled the traditional way, thanks a lot, I am reinstalling them as we speak

Yes!!! Uninstalling them both, rebooting the device and reisntalling them did the trick. Thanks a million, now both fonts and pixel density ratio are both functioning perfectly well in UI Themer. And you were right not to be conversant with handy and gasptown fonts as they are missing from the fonts secton on openrepos, along with a host of other fonts on my memory card I downloaded from here more than 2 years ago

Jaracz's picture


Where can I get that lovely Meego Theme from the sceenshots?

Thank you in advance!


Best regards,


fravaccaro's picture

that's the awesome work of chenliangchen, but unluckily I'm not able to share it :(

malibu's picture

Thanks for answer. I tried it but unfortunately it doesn't work, the value is still coming back to 1 by itself. Is this possible that patches cause that ? Sorry for my english ;D

fravaccaro's picture

My pleasure :)

Would you mind providing the output of

ls /etc/dconf/db/vendor.d/locks

malibu's picture

Output : screen-rotation.txt

And screen-rotation.txt contain only this line : /desktop/jolla/components/screen_rotation_angle

malibu's picture

Great app, thanks a lot.
I just get a problem since a long time ( app is updated ! ):

Device pixel ratio stay blocked on 1.
(Jolla phone 1, this was working before. But i don't know which version bring that. )

fravaccaro's picture

Hi, thank you.

You may need to reinstall themepacksupport.

DameCENO's picture

fravaccaro, help, just upgraded to 2.1.3 and the display density submenu is gone, and fonts won't apply anymore, how can I fix it, or do we need an upgrade of the app? I can't imagine using Jolla 1 without UI Themer.

fravaccaro's picture

Display submenu from where?

As for rhe fonts, they don't apply if you forgot to unapply them before upgrading. Check the Tools menu to reinstall them.

hardy_magnus's picture

u r a savior. today i upgraded, forgot to restore defaults n the fonts wont change. thank to fravaccaro we have tools menu . hey i have n9 font, can u tell me how to appy them ?

DameCENO's picture

Sorry for the mix up, in UI Themer, I had forgotten how to locate the pixel density option but I have. As for the fonts, I had to run pkcon refresh then pkcon install sailfish-fonts to have them applying again as I always forget to revert to default font before upgrading.

But as for the pixel density is just as when i upgraded to lijoki, it remains on the default value and won't change no matter what I try. I have gone through the instructions you gave the last time with dconf update and all, installing and reinstalling ui themer, nothing works, I  need assistance on that please

fravaccaro's picture

Try to reinstall themepacksupport too.

DameCENO's picture

Did the trick perfectly! Uninstalled Themepack support then ran the commands you previously asked me to dconf update and the rest and it works once again! Thanks man, I owe you one. I don't think I will forget to revert to default font and pixel ratio before upgrading the OS next time :D


An observation as well, after making it work themepack support icon disappeared form the home screen but can still be run via therminal, don't know if that's normal

fravaccaro's picture

I'm glad to hear you solved it :)

Yeah, it's an intended behavior, as I think that after the installation of UI Themer, a quick access to the terminal GUI is no longer needed.

DameCENO's picture

Hi fravaccaro I have updated to Iijoki and updated the ui themer but the same issue occured as when I try installing to 0.4 of ui-themer, the pixel ratio slider remains at the default value, I have removed the ui themer altogether and run the touch and dconf reset commands but to no avail. What should I do about it

Plus the suggestion of adding font preview before applying would be awesome

fravaccaro's picture

Sorry, I didn't read your message but I'm glad (according with your reply below) that you could sort it out.

As for the font preview, I'm afraid I won't be able to implement it, but I contacted the original dev of the GUI so I hope we can come up with something...stay tuned :)

MoritzJT's picture

UI of this GUI is broken on my Jolla C. Default density is  1.25 - lowering it breaks most system icons. Any idea?



fravaccaro's picture

try to install themepacksupport 0.3.3-3

DameCENO's picture

Actually the version 0.3.3-5 of themepacksupport is said to be compatible with UIThemer so installing it was enough to fix the aspect ratio slider. Thanks fravaccaro.