SERIES vs 성북u
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SERIES
Explore a vast library of over 160,000 webtoons and web novels. Get personalized recommendations, enjoy exclusive content, and benefit from daily free passes and time-limited deals. Customize your reading experience with TTS and adjustable settings.
- Personalized recommendations
- Exclusive content
- Daily free passes
- Time Deal events
- TTS function
- Customizable reading settings
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Discover Your Life-Changing Story on SERIES Over 160,000 webtoon and web novel titles are waiting for you! Start enjoying them right now on the SERIES app. SERIES Helps You Find What You Love - The more you read, the more accurate our personalized recommendation system becomes—your feed will be full of tailored picks! - Discover popular titles through a variety of rankings, including hourly-updated rising charts and SERIES Best Rankings. - Enjoy exclusive content available only on SERIES! Enjoy a Variety of Rich Benefits - 10PM Daily Free: Register once and receive a daily pass every night at 10 PM. - Time Deal: Limited-time events offering free episodes for a short period! - Free Pass: Receive one NOVEL and one COMIX ticket every two hours, every day. - Plus, don’t miss out on other special benefits available through various events! The Ultimate Viewer for Immersive Reading - Enjoy stories more comfortably with our TTS (Text-to-Speech) function. - Share your favorite moments as images with stylish backgrounds. - Customize your reading experience with themes, fonts, and text size settings. ----------------------------------------------------------------------------- Experience difficulties while using Series app? The Naver customer center is more than happy to help. Series awaits your valuable input. * Naver customer center: https://m.help.naver.com/support/index.nhn * Email inquiries: navercc@naver.com -----------------------------------------------------------------------------
성북u
This app unifies multiple libraries in the Seongbuk district, offering a single platform to search for and manage library resources. Users can reserve books, check loan status, and access their borrowing history across all integrated branches.
- Integrated library search
- Book reservations and cancellations
- Loan status and history
- Renewal requests
- Interlibrary loan applications
- User authentication for services
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성북u-도서관은 성북정보도서관, 아리랑도서관, 해오름도서관, 종암동새날도서관, 서경로꿈마루도서관, 석관동미리내도서관, 달빛마루도서관, 정릉도서관, 청수도서관, 월곡꿈그림도서관, 아리랑어린이도서관, 장위행복누림도서관, 성북길빛도서관, 오동숲속도서관을 하나로 통합한 전용 어플리케이션 입니다. 도서관 소장자료 검색 및 통합검색이 가능하며 도서관 회원은 인증을 통하여 도서관 서비스를 이용할 수 있습니다. 도서의 예약,예약취소,반납연기,상호대차신청 및 대출이력, 대출현황,예약현황을 확인 할 수 있습니다.
Screenshots
Verdict
The clearest difference is rating: SERIES at 4.5 against 성북u's 3.0. SERIES also leads on ratings volume (2K vs 2) and chart position (#58 vs unranked). 성북u's advantage is in-app purchases (none vs 15) and ads (none vs shown). On price, review sentiment, update cadence and device support 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. SERIES sells 14 one-off in-app purchases. 성북u asks for nothing beyond the download.
SERIES holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: SERIES has 2K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 30% of SERIES's written reviews are positive against 33% of 성북u's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.
| Parameter | SERIES | 성북u |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2K ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 29.7% of reviews | 33.3% of reviews — better |
| Number of ratings | 2K — better | 2 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #58 — better | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 198 MB | 19 MB |
| Age rating | 12+ | 4+ |
| Developer | NAVER WEBTOON Ltd. | (주)이씨오 |
Customer experience
SERIES
성북u
Bugs and requests
SERIES
Reported bugs
3 issues- App crashes and freezes
- Inconsistent content display issues
- Syncing/download problems
Requested features
3 requests- Add translation/language support
- Improve payment options for international users
- Implement a more user-friendly login/authentication process
성북u
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SERIES
- 쿠키 10개$0.49
- 쿠키 10개$0.99
- 쿠키 30개$1.99
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- 쿠키 50개$3.99
- 쿠키 49개$4.99
- 쿠키 100$6.99
- 쿠키 100개$9.99
- 쿠키 200개$14.99
- 쿠키 175개$14.99
- 쿠키 250개$19.99
- 쿠키 300개$22.99
- 쿠키 300개 + 보너스 쿠키 30개$24.99
- 쿠키 325개$29.99
- 쿠키 500개$39.99
성북u
No in-app purchases
