DörtKitap
by Akin Ekici
- Books
- Paid
- Small & simple · 97
- Rating
- 4.7
- 6 ratings · Türkiye storefront
- Last update
- May 3, 2026
- Version 4.0.0
- Size
- 45 MB
- Category
- Books
- Tracked since
- Oct 9, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
Dört Kitap, içeriğe hızlı ve kesintisiz erişim sunan, sade ve işlevsel bir deneyim için tasarlanmıştır. Karmaşadan uzak yapısı sayesinde aradığınız bilgilere doğrudan ulaşabilir, uygulamayı kolaylıkla kullanabilirsiniz.
İster kısa bir göz atma ister daha kapsamlı bir inceleme için kullanın; Dört Kitap, ihtiyaç duyduğunuz her an elinizin altındadır.
Uygulama çevrimdışı çalışır, internet bağlantısı gerektirmez ve herhangi bir üçüncü taraf yazılım barındırmaz.
What’s new
Release notes for the latest version, as written by the developer.
- Kaldığınız yeri kaydetme özelliği
- Arayüz iyileştirmeleri
- Gelişmiş veritabanı altyapısı ile daha hızlı deneyim
- Geliştirilmiş hızlı arama
- Notlar özelliği
- İstatistikler
- Performans iyileştirmeleri ve daha fazlası
Rank history
Daily position in the Nauru charts. #1 is at the top.
- Best rank
- #2
- Current rank
- #2
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
97/100
Small & simple
- Developer size100% · 25
Developer: 1 app on the charts
- Audience size100% · 20
Ratings: 6
- App size100% · 10
Size: 45 MB
- Price model100% · 15
Price model: paid
- Demand proof90% · 30
Best rank #1, 8 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 4.0.0LatestReleased May 3, 2026