You’ve Already Watched This One. You Just Don’t Remember.
It’s 11 PM. You’re scrolling through Crunchyroll looking for something new. A thumbnail catches your eye — cool art, interesting synopsis. You click play. Ten minutes in, a scene feels weirdly familiar. Then a character says a line you could swear you’ve heard before. And then it hits you: you watched this six months ago. You just forgot.
Or maybe it’s the manga version of this nightmare. You’re at the bookstore, staring at a shelf of Jujutsu Kaisen volumes. You own volumes 1 through… 14? Or was it 15? You bought 12 and 13 at a convention, but did you ever get 11? You pull out your phone, scroll through your Amazon order history, check three different apps, and ultimately buy volume 15 because you’re pretty sure you have everything before it. You get home. You already had volume 15.
If any of this sounds like your life, congratulations — you’re a completionist with a tracking problem. And you are not alone.
The Completionist’s Dilemma
Being a completionist is a blessing and a curse. On one hand, you get the deep satisfaction of finishing every episode, collecting every volume, and knowing a series inside out. On the other hand, the sheer volume of content in the anime and manga world is staggering.
Consider the numbers:
- MyAnimeList lists over 27,000 anime entries and over 75,000 manga entries
- A typical seasonal anime lineup drops 40-60 new shows every three months
- Popular manga series can run 30+ volumes, with some (looking at you, One Piece) pushing past 100
- If you watch anime AND read manga AND collect physical volumes, you’re juggling three separate tracking problems at once
Your brain was not designed for this. It was designed to remember where the berries are and which animals want to eat you. It was not designed to remember whether you dropped “Bleach” at episode 167 or 168, or which isekai from 2024 was the one with the pharmacist (it was “Parallel World Pharmacy,” and yes, it was actually good).
The completionist’s dilemma is this: the more you consume, the harder it gets to remember what you’ve consumed. And the harder it gets to remember, the more likely you are to waste time, waste money, and miss the stuff you’d actually love.
Why Apps Aren’t Cutting It
“Just use MyAnimeList,” people say. Or AniList. Or Kitsu. And look — those platforms are great for what they do. Community ratings, recommendations, seasonal charts. But for serious tracking? They have real limitations.
The App Problem
- Fragmented tracking. Most apps handle either anime or manga well, not both. And almost none of them track your physical collection (volumes owned, condition, edition, where you bought them).
- No financial tracking. You know you’ve spent a lot on manga volumes. But how much? Which series has cost you the most? What’s your average cost per volume? Apps don’t care about your wallet.
- Limited custom fields. Want to track which streaming platform you watched a show on? Whether you own the Blu-ray? Which friend recommended it? Good luck adding that to AniList.
- Platform lock-in. Your data lives on someone else’s server. If the service shuts down or changes their API, your carefully maintained list goes with it.
- No collection gap analysis. You own 47 volumes of Naruto. Which ones are you missing? An app will tell you which chapters you’ve read, but it won’t tell you which physical books are absent from your shelf.
For casual viewers, apps work fine. But completionists aren’t casual. Completionists need a system they control — one that tracks not just what they’ve watched and read, but what they own, what they’ve spent, and where the gaps are.
What a Real Tracking System Looks Like
A proper anime and manga tracking setup does more than maintain a watch list. Here’s what it should cover:
Anime Tracking
- Series info: Title, genre, studio, episode count, year, status (airing/completed/dropped)
- Your progress: Episodes watched, current status (watching/completed/on hold/dropped/plan to watch), date started, date finished
- Rating and notes: Your personal score, thoughts, favorite characters, memorable moments
- Where to watch: Which streaming service has it, whether you own it physically or digitally
- Rewatch tracking: How many times you’ve rewatched it and when
Manga Tracking
- Series info: Title, author, genre, volume count, serialization status
- Reading progress: Chapters read, volumes read, current status
- Physical collection: Which volumes you own, edition type (standard, deluxe, omnibus, box set), condition, purchase price
- Collection gaps: Which volumes you’re missing in a series
- Spending: Total spent per series, average cost per volume, monthly spending trends
The Dashboard View
The real power comes from seeing everything at once. How many series are you currently watching? How many are on hold? What’s the total value of your manga collection? Which genres do you gravitate toward? How does your watching pace compare month to month?
This is where spreadsheets absolutely shine — and where apps fall short.
The Spreadsheet Advantage
Here’s the thing about spreadsheets that completionists eventually discover: they’re infinitely customizable, they work offline, and nobody can take your data away.
A well-built tracking spreadsheet gives you:
- Total control over your fields. Track anything you want. Platform, format, edition, purchase location, gift vs. self-purchase, rewatch count, emotional damage rating — whatever matters to you.
- Built-in math. Your collection value updates automatically. Your completion percentages calculate themselves. Your spending trends graph without any extra setup.
- Sorting and filtering. Show me all anime I rated 9 or higher. Show me all manga series where I’m missing volumes. Show me everything I watched in 2025. Done.
- Portability. It’s a file on your computer. Back it up, share it, move it between devices. It doesn’t depend on a server staying online.
- Visual dashboards. Charts, conditional formatting, progress bars. A well-designed spreadsheet is genuinely satisfying to look at — and for completionists, that visual feedback loop is addictive in the best way.
Building a tracking spreadsheet from scratch is absolutely doable, but it takes time to design the layout, set up the formulas, and make it look good. That’s the tradeoff: total customization, significant setup effort.
Or you can skip the setup entirely. The Anime Tracker for Excel and Manga Tracker for Excel were built specifically for this — pre-built dashboards, smart formulas, and fields designed around how completionists actually track. If you live in Google Sheets, there are Sheets versions too. And if you prefer Notion, both an Anime Tracker for Notion and a Manga Tracker for Notion exist as well.
How to Actually Set Up Your Tracking System
Whether you build your own or use a template, here’s the process for getting your tracking under control without losing your entire weekend.
Step 1: Start With What You’re Currently Watching/Reading
Don’t try to backfill your entire history on day one. That’s a recipe for burnout. Instead, start with what’s active right now:
- Every anime you’re currently watching
- Every manga you’re currently reading
- Every series you fully intend to start this season
Get those logged first. This is your foundation.
Step 2: Add Your Physical Collection
If you collect manga volumes, this is where the real value kicks in. Go shelf by shelf:
- Log every series and which volumes you own
- Note the edition (standard, box set, omnibus, collector’s)
- If you remember what you paid, log it. If not, estimate or check your order history.
This is the step where most people discover they have gaps they didn’t know about. That Demon Slayer set you thought was complete? You’re missing volume 8. Those Attack on Titan omnibuses? You jumped from 5 to 7.
Step 3: Backfill Your History (Gradually)
Over the next few weeks, add completed series as you remember them. Don’t stress about getting every rating perfect or remembering exact dates. A rough “watched in 2023” is better than nothing.
Pro tip: your streaming services keep watch history. Crunchyroll, Netflix, Funimation (rest in peace) — check their history pages to jog your memory.
Step 4: Make It Part of Your Routine
The system only works if you use it. The easiest habit: update your tracker every time you finish an episode or chapter. It takes 30 seconds. Over time, it becomes automatic — like closing the app after you’re done watching.
The Surprising Benefits Nobody Talks About
People start tracking to solve the “did I already watch this?” problem. But the real benefits go deeper.
You Actually Finish Things
When you can see that you’re 85% through a series, you’re way more likely to push through and finish it than if it’s just floating vaguely in your memory. The progress bar is a powerful motivator.
You Save Money on Manga
Once you can see exactly what you own and what you’re missing, you stop buying duplicates. You also start noticing spending patterns — like that you dropped $200 on manga in January but only actually read three new volumes. That kind of awareness changes behavior.
You Discover Your Own Taste
After logging 50+ anime with ratings and notes, patterns emerge. Maybe you consistently rate mystery shows higher than action shows. Maybe you love short-run series (12 episodes) but lose interest in long ones. This self-knowledge makes your future picks way better.
You Become the Recommendation Person
Nothing earns anime cred like being able to instantly pull up a curated list when someone asks “what should I watch?” Your tracker becomes your personal recommendation database, sortable by genre, rating, and mood.
You Stop Feeling Overwhelmed
This is the big one. A backlog of 200 shows feels crushing when it’s an amorphous cloud in your head. The same backlog feels manageable when it’s a sorted, filterable list with priorities. You can’t manage what you can’t see. Once it’s visible, it’s actionable.
For the Collectors: Tracking Your Physical Collection’s Value
If you collect manga, anime Blu-rays, or figures, your collection has real monetary value — and it’s probably more than you think.
A tracking spreadsheet with purchase prices lets you:
- Know your total collection value at a glance
- Track price trends for series that are appreciating (out-of-print volumes can spike dramatically)
- Make informed selling decisions if you ever downsize
- Insurance documentation — if something happens to your collection, you have a detailed record of what you owned and what it cost
The Comic Book Tracker is another option if your collection extends beyond manga into Western comics, graphic novels, and trade paperbacks.
Building Your Tracking Habit
The biggest risk with any tracking system isn’t the setup — it’s abandonment. Here’s how to make sure your tracker doesn’t become another forgotten bookmark.
Keep it accessible. If your tracker is buried in a folder three levels deep, you won’t open it. Pin it, bookmark it, put a shortcut on your desktop or home screen.
Update in real time, not in batches. “I’ll update it later” is the death sentence for every tracking system. Update immediately after you finish an episode or acquire a new volume. Thirty seconds now saves thirty minutes of catch-up later.
Celebrate the milestones. Finished your 100th anime? Completed your first full manga collection? Screenshot your dashboard and share it. The completionist community on Reddit and Twitter loves this stuff.
Don’t aim for perfection. Your historical data doesn’t need to be flawless. A 90% accurate tracker that you actually use is infinitely more valuable than a perfect tracker you abandoned in week two.
Start With What You Have
You don’t need a perfect system on day one. You need a system that exists. Open a spreadsheet — or grab the Anime Tracker or Manga Tracker if you want a head start — and log the five shows you’re watching right now. That’s it. Five entries. Takes two minutes.
Tomorrow, add your current manga reads. The day after, start on your physical collection. Within a week, you’ll have a system that’s already saving you from duplicate purchases and forgotten episodes.
And if anime and manga are just the beginning of your Asian media rabbit hole — if you’re also deep into K-dramas and K-pop — the Asian Media Bundle packages the Anime Tracker, Manga Tracker, Asian Drama Tracker, and K-Pop Tracker together at a discount. One purchase, four trackers, zero excuses for losing track of anything ever again.
Your backlog isn’t going to shrink on its own. But at least now you’ll know exactly how big it is — and you’ll have a plan to work through it, one episode at a time.