책력 vs Two Birds
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
책력
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Chaengnyeok is the simplest way to keep your reading log on a calendar. - See it all at a glance Your own reading calendar, where each day fills in with the cover of the book you read. Look back on the month and see just how much you've read. - Instant cover search Just search a book title to pull its cover image straight from the web. One tap, and your entry is done. - Never lose track of what you're reading Capture a book's whole journey — from the day you start to the day you finish. - Record it your way Genre, publisher, author, rating, a one-line impression, and full reviews. - Reading habit stats Books finished each month, your most-read genres, and average reading time. With Chaengnyeok, the days you read become a record.
Two Birds
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Save a link from the Share Sheet, and Two Birds brings it back later, one at a time, and asks: "Still want to go?" That restaurant from Instagram, that "watch later" video, that link you sent yourself, that screenshot from a shopping app. You save it, then forget it. Two Birds isn't an app that helps you save more. It's a bookmark app that makes you look again and decide. ■ Save without thinking Tap "Two Birds" in the Share Sheet and you're done. Links save as they are. A screenshot needs just one tap to sort into Eat, See, Buy, or Learn. No folders, no tags. ■ It asks you back, one at a time Open the app and you won't see a list, just one card. "Still want to go?" There are three answers: Went, Keep it, Let it go. Any answer counts, as long as you decide. ■ Widgets remember for you Home Screen and Lock Screen widgets show what you saved before you go looking. Reminders to look again come at most once every two days. ■ Might as well stop by Get a note when you're near a neighborhood you saved something in, and see what's nearby on the Today tab. Your location never leaves your device, and it stays off until you turn it on. ■ Write it down, and To do Save a thought without a link. What you write down gathers in the To do tab, and a due date gets you a reminder as it approaches. ■ My way Make a collection from a word of your own, and everything saved with that word gathers by itself. It's an optional one-time purchase. ■ Buy it online Items saved as "Buy" have a "Buy it online" button. It works out the kind of product from the title, or from the photo if you allow it, and takes you to an online store search. Shown only when your device region is Korea. These are affiliate links, so the app earns a commission on purchases. These are affiliate links, so the app earns a commission from qualifying purchases. ■ Bring in what's already piled up Import reads the official export files of KakaoTalk's "Message myself", YouTube's "Watch later" and Instagram's "Saved". Your original save dates come along. ■ What's not here No sign-in, no subscriptions, no folders, no tags. Save as much as you like. The only ad is one banner at the bottom of the Today tab.
Screenshots
Verdict
The clearest difference is in-app purchases: 책력 at none against Two Birds's 1. 책력 also leads on ads (none vs shown). Two Birds's advantage is update cadence (every 2 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Two Birds sells 1 one-off in-app purchase. 책력 asks for nothing beyond the download.
책력 ships an update every 3 months, Two Birds every 2 weeks. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | 책력 | Two Birds |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 32 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | jeongrim oh | Tae Yong Park |
In-app purchases
책력
No in-app purchases
Two Birds
- My way$0.99









