Timo Partl in a few pages, for writers, partners and anyone curious: the facts, the people, the money, the products and the news. Put together by ToolGPA, not by Timo Partl.
Diarium is made by Timo Partl, an independent app developer in Germany who also makes WorkingHours, GeoPhoto, SubTotal and AtomicClock. Diarium is free on most platforms and earns money from one-time Pro purchases per platform, with no subscription.
Based in
Germany
Ownership
Privately held
Unofficial. Put together by ToolGPA from Timo Partl’s own pages, news reports and our own grades, read Oct 18, 2026. Not made, paid for or approved by Timo Partl. toolgpa.com
Part 01 · Company
The company
Who they are, the facts in one place, and the people who run it
In a sentence
Diarium is made by Timo Partl, an independent app developer in Germany who also makes WorkingHours, GeoPhoto, SubTotal and AtomicClock. Diarium is free on most platforms and earns money from one-time Pro purchases per platform, with no subscription.
In a paragraph
Timo Partl was based in Germany. An independent app developer, in his own words.
Free to quote. Please link to toolgpa.com so readers can check the facts.
Fact sheet
Company
Timo Partl
Based in
Germany
Team
An independent app developer, in his own words
Website
diariumapp.com
Products we list
Diarium
Ownership: Privately held
Timo Partl describes himself as an independent app developer from Germany, and his pages name no company, parent or investor behind Diarium.
Diarium, as ToolGPA grades it: five subjects, a letter for each, and a GPA.
Diarium
Private journal with a one-time Pro purchase and your own cloud sync
#2 of 36 journaling appsFrom $14.99 one-time purchase per platformFree plan4.8 on the App Store
3.2GPA
Our pick for people who want to pay once and keep the journal themselves. It runs on Windows, Android, iPhone, iPad and Mac, and syncs through your own cloud storage.
AValue
CFree
BFeatures
AEase
BPlatforms
Diarium’s grade as a badge for its own site, free: it updates itself and links to the review. Code at toolgpa.com/badges.
Part 03 · News
News and contacts
What they have announced lately, and every official channel
This media kit is ToolGPA’s own summary of what Timo Partl’s pages, news reports, investors’ announcements and public filings said on the dates shown, with our own grades. It is not made, paid for or approved by Timo Partl, and Timo Partl’s names and logos are trademarks of their owner. Grades are our judgement under the rules at toolgpa.com/grades. ToolGPA uses affiliate links and may earn a commission from them, and it works with sponsors; no one can pay for a grade. Product pictures are Timo Partl’s own, from its website and app-store listings.
