So you're trying to track On Titan History
Let's get one thing straight up front. I've dealt with this enough times over the years to know where the confusion starts, and it usually happens before anyone even opens the tool. People come in thinking On Titan History is going to give them a clean timeline of events. It doesn't work that way, and here is why. That is the first mistake. It is a feature within the Attack on Titan franchise ecosystem, mostly tied into official companion apps, the manga release tracker, and certain anime streaming platforms that include episode-by-episode logs. There is no single download you get from a software store called "On Titan History." What exists are third-party wikis, fan-maintained timelines, and official guidebooks that serve this purpose. If you are looking for a dedicated application, you will mostly find clones and low-effort ports on Android and iOS that scrape data from MAL or AniList APIs. They exist. Most of them break within six months of a major season release because the developer stops updating them. I learned that the hard way in 2019 when my phone was full of abandoned apps after the Final Season announcement dropped and nobody bothered refreshing their databases.
What actually works for tracking On Titan History
There are three real options, and each one has a different use case. The best one depends on whether you want a visual timeline, an episode checklist, or lore accuracy across the entire manga run. The first option is the official Kodansha companion materials. The Art of Attack on Titan books and the official guidebooks published by Kodansha contain the most reliable chronological data. These are physical books. You buy them. They cost between twenty and fifty dollars depending on which volume. But if you need accuracy on timeline events, character backgrounds, and prequel information like the Survey Corps histories, this is the closest thing to a primary source you are going to get outside of reading the manga itself. The second option is a wiki-based system. The Attack on Titan Wiki, also known as the fando m Wiki, maintains one of the most detailed free timelines available. It tracks everything from the fall of Wall Maria through the Rumbling. The problem with wikis is that they are community-edited. I ran into a specific issue a while back where the timeline for the Shiganshina District arc had conflicting dates between the anime adaptation and the manga. The wiki page showed both but did not clearly label which was canon. I spent about forty-five minutes cross-referencing chapter numbers with episode numbers to figure out the discrepancy. The workaround was simple: I stopped trusting the wiki timeline table and instead built my own spreadsheet using only chapter and episode references as anchors. That took me about two hours to set up, but it has not broken since.
The third option is using an anime tracking app with a custom list. MyAnimeList and AniList both let you create custom lists and add notes. I use this method because it gives me a personal log I can update as I go. The downside is that it requires manual entry. You have to add each episode or chapter yourself. It takes time upfront, maybe an hour to set up a proper tracking workflow, but once it is running, it stays accurate because you control the data.
Get the Full Details
A realistic edge case you should know about
Here is something most people do not run into until it is too late. The anime and the manga diverge in the later arcs. If you are using On Titan History as a reference while watching the anime and you want to know what happens next in the source material, you are going to hit a wall around Season 4, Episode 10 or so. The anime was still adapting at that point, and timelines on most fan sites blend anime-only content with manga content without marking the difference. I found this out while helping someone who wanted to know the exact chronological order of the OVA episodes relative to the main story. Most sites list them in release order. That is wrong if you want narrative chronology. The OVA titled "Ilse's Notebook" happens early in the story, before the female titan arc. The "No Regrets" OVAs happen decades earlier in timeline. If you are building a timeline and you put No Regrets in release order, your entire sequence shifts by years. The fix is to look up the internal timeline dates, not the release dates, and map everything to those instead.
Common mistakes that waste your time
The biggest mistake I see is treating the anime timeline as complete. It is not. The anime coverage is incomplete compared to the manga, and relying on anime-only sources will leave you missing roughly thirty percent of the story's historical detail. Another mistake is using fan-made timelines without checking the sources. A lot of popular timelines on Reddit and YouTube have errors in the Eren Jaeger timeline section because they confuse the anime's altered airing order with the actual story chronology. There is also a misconception that On Titan History apps are worth installing. They are not, unless you are comfortable with buggy software that may stop working after a season release. I kept three different apps on my phone at one point. Two of them were useless within a month. I kept one that was barely functional but had a clean interface. That one stopped receiving updates after the Final Season began. I migrated everything to a local spreadsheet after that.
What I would do if I were starting over
I would skip the apps entirely. I would get the Kodansha guidebooks for reference material and use MyAnimeList with a personal spreadsheet for timeline tracking. The spreadsheet should have columns for arc name, chapter range, episode range, and internal timeline date. That gives you one source of truth without depending on someone else's API or a website that might shut down. It also means you can sort by timeline date instead of release date, which is the whole point of doing this in the first place.
