Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.
From our daily snapshots of every grossing chart and daily ratings counts.
| Sep 24, 2026 | $635 a month |
| Sep 25, 2026 | $635 a month |
| Sep 26, 2026 | $635 a month |
| Sep 27, 2026 | not in a grossing chart |
| Sep 28, 2026 | not in a grossing chart |
| Sep 29, 2026 | not in a grossing chart |
| Sep 30, 2026 | not in a grossing chart |
| Oct 1, 2026 | not in a grossing chart |
| Oct 2, 2026 | not in a grossing chart |
| Oct 3, 2026 | not in a grossing chart |
| Oct 4, 2026 | $3.6K a month |
| Oct 5, 2026 | $3.6K a month |
| Oct 6, 2026 | not in a grossing chart |
| Oct 7, 2026 | $2.5K a month |
| Oct 8, 2026 | not in a grossing chart |
| Oct 9, 2026 | not in a grossing chart |
| Oct 10, 2026 | $2.5K a month |
| Oct 11, 2026 | $2.2K a month |
| Oct 12, 2026 | $2.2K a month |
| Oct 13, 2026 | $2.9K a month |
| Oct 14, 2026 | $5.5K a month |
| Oct 15, 2026 | $3.6K a month |
| Oct 16, 2026 | $667 a month |
| Oct 17, 2026 | $348 a month |
| Oct 18, 2026 | $8K a month |
| Oct 19, 2026 | $7.7K a month |
| Oct 20, 2026 | $3.9K a month |
| Oct 21, 2026 | $14.6K a month |
| Oct 22, 2026 | not in a grossing chart |
| Oct 23, 2026 | not in a grossing chart |
| Oct 22, 2026 | 1.2K ratings |
| Oct 23, 2026 | 1.2K ratings |
Measured from the store, not estimated.
From the latest 500 reviews on the Japan App Store, May 24, 2013 to Sep 20, 2026: 34% are 1 or 2 stars. Open a theme to read what people wrote.
57 of the 1 and 2 star reviews.
★★★★★ The main feature of the app is behind a pay wall.
★★★★★ I get a new book and tried to scan it in the app and it said that I have to pay for a subscription or use coins.
★★★★★ It also kept trying to get me to upgrade to the subscription service.
39 of the 1 and 2 star reviews.
★★★★★ When I did, and tried to open the app, an error message popped up, and all of my books have now disappeared.
★★★★★ All it does is scam you out of a dollar here, a dollar there… definitely don't waste your money on the “import kindle library” as this doesn't work..I deleted it after I wasted 5 bucks.
★★★★★ Have tried adding books on iPad and iPhone but they won't sync up despite purchasing the unlimited $9.99/month bundle.
31 of the 1 and 2 star reviews.
★★★★★ When I did, and tried to open the app, an error message popped up, and all of my books have now disappeared.
★★★★★ Not working even though it's the full program.
★★★★★ This used to be great now they are doing all these “app updates” and it wont accept my email address anymore or let me add cover pictures. On the verge of deleting this thing and finding another one. Fix the issues
17 of the 1 and 2 star reviews.
★★★★★ But you need to pay for premium or for “tokens” in order to scan books which feels misleading.
★★★★★ I get a new book and tried to scan it in the app and it said that I have to pay for a subscription or use coins.
★★★★★ You can only scan so many before you have to get tokens.
14 of the 1 and 2 star reviews.
★★★★★ Making the app useless unless you pay up.
★★★★★ I tried the quiz part of this app to try it for a book I already read and it was very inaccurate.
★★★★★ What a massive and useless scam.
13 of the 1 and 2 star reviews.
★★★★★ The last update literally ERASED my entire history!!
★★★★★ I have had an account for 2-3 years. 1400+ books added to the app. I get a new book and tried to scan it in the app and it said that I have to pay for a subscription or use coins. That's just a money scheme. There are…
★★★★★ The newest update ruined my book list, got rid of most my covers.
11 of the 1 and 2 star reviews.
★★★★★ I have had an account for 2-3 years.
★★★★★ Checked the account screen and got a green check mark.
★★★★★ It said above that you didn't need to login wit Facebook, but it gave me no choice but to login with Facebook.
7 of the 1 and 2 star reviews.
★★★★★ It kept freezing on me, for one.
★★★★★ They are either frozen or lost.
★★★★★ Aside from the random crashing during the book input process, the features of this make you really feel that this is a stand-alone app, similar to a spreadsheet.
56 of the 4 and 5 star reviews.
★★★★★ It took a minute to figure out some of the options but it's pretty easy.
★★★★★ Super easy to add in books to keep track
★★★★★ I had a bunch of books I needed to inventory and the barcode scanner made it incredibly easy.
31 of the 4 and 5 star reviews.
★★★★★ So far getting a hang of the app but really enjoy it. Now I can have a portable list of my books so i know what I need and what I already have.
★★★★★ For those that like reading, this app is so helpful in tracking what you've read and you can add notes when you've read it!
★★★★★ Nice app, helps me remember books I'm looking for
15 of the 4 and 5 star reviews.
★★★★★ Makes inventorying much easier.
★★★★★ Also, when on two separate occasions it was necessary to address a problem I received accurate responses within a few hours.
★★★★★ This is what I use it for and it works perfectly.
8 of the 4 and 5 star reviews.
★★★★★ The virtual shelves of this app are filling up fast.
★★★★★ Very quick and easy to use without needing instruction
★★★★★ It does what it claims & I really rely on it.And also , when you have a problem with app, the owner, they're fast and efficient to solve the problem.
8 of the 4 and 5 star reviews.
★★★★★ If you want a simple book app that's free you will like this one!
★★★★★ The only downside is that this app isn't entirely free—you have to purchase more room on your shelf after you've added a few, and the barcode scanner also isn't free after 15 scans.
★★★★★ Got this app free today and used it to scan my library of books.
Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.
Latest reviews, Japan App Store.
I personally love this app. It took a minute to figure out some of the options but it’s pretty easy. I do wish we could have different colored checkmarks (that we could label) for different things… such as books loaned out could be blue or whatever…Then I can see that at a glance of my bookshelves.
The main feature of the app is behind a pay wall. I understand charging for some features of an app, but when I downloaded this “free” app to keep track of what books I have. But you need to pay for premium or for “tokens” in order to scan books which feels misleading. Making the app useless unless you pay up. I was going to consider paying for the premium once I found out if I liked the app or not because the cost is reasonable and I have a lot of books to keep track of but I can’t even throughly test if I like the app.
Sucks that you have to pay for this app to be functional, but it’s the most aesthetically pleasing app I’ve found SO FAR. The newest update deleted all my tags, and there’s no way for me to take a tag off a book without deleting it, so that’s annoying. You can’t rearrange books, which you would think would be an easy thing to implement, but maybe one day. I haven’t had any scanning problems so far like others, but I’ll definitely come back if I experience it. If you want a completely free app, this isn’t for you, but if you’re willing to pay a lil a month for ease OR until you find a better app, it’s not bad.
I had been keeping track of my read and to be read books in this app. The last update literally ERASED my entire history!! Seriously. Do better!
I wish there was a way to drag your books and rearrange them.
I have had an account for 2-3 years. 1400+ books added to the app. I get a new book and tried to scan it in the app and it said that I have to pay for a subscription or use coins. That’s just a money scheme. There are free apps that have the same concept that work just as good. I’m gone.
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Released Aug 5, 2011. Current version shipped Sep 14, 2026.
Prices, ranks and reviews are per country. Revenue above is already worldwide.
