Comparison

CJ ONE vs Bill Letter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CJ ONE

This lifestyle membership service offers exclusive benefits, special experiences, and rewards. Enjoy personalized deals, brand coupons, and convenient point accumulation and redemption through a mobile barcode. Engage in daily missions for extra points and rewards.

Highlights
  • Personalized benefit community
  • Brand coupons for dining, shopping, culture
  • Mobile barcode for points and gift cards
  • Daily missions for points (roulette, games, steps)
  • Point accumulation and redemption
  • Gift card registration and usage
Features
Read full description

Everyday Sparkle, CJ ONE From everyday perks to exclusive experiences on special days! CJ ONE is a true lifestyle membership service designed to be with you in every moment. ● Enjoy CJ brand benefits and news on CJ ONE Global. - Anyone can join the membership, even if you don't reside in Korea or aren't a Korean national. - Simply tap the globe icon on the home screen to switch to Global Service. - Discover various CJ brands and enjoy exclusive discounts and point rewards. ● Make your day special with coupons from diverse brands. - Welcome coupons for new members and birthday coupon packs every year on your birthday. - Discover various coupons across dining, shopping, and entertainment directly in the app. ● Easily earn and redeem points with a single barcode. - Earn, redeem, and apply coupons all at once with just one barcode. - Scan your barcode to earn points and receive extra bonus points. [Access Permissions] The access permissions required to use the Service are as follows. These permissions are necessary to provide the CJ ONE Global Service. 1. Required access permissions - Device and app history: checking the app's running status - Device ID: preventing multiple logins - Device identifier (UUID): preventing fraudulent use of the Service The optional permissions below are not collected or used for Global Members. 2. Optional access permissions - Address book: searching contacts when gifting points or gift cards/mobile vouchers (ONECON) - Location: Wonderland, coupons, store finder - Camera: ONE Walk background setting and scanning barcodes, QR codes, and credit cards - Photos: attaching images to community posts, ONE Walk background setting - Biometric authentication: simple login and authentication using face, fingerprint, etc. - Physical-activity access: measuring steps in ONE Walk * How to change access permissions: Device Settings > CJ ONE * Optional access permissions require allowance when the relevant feature is used; even if not allowed, services other than that feature remain available. [Please Note] - Supported on iOS 15.0 or higher. - For security purposes, service use is restricted on devices with modified operating systems (e.g., rooted, jailbroken). - You can receive a mobile card immediately upon downloading the app and signing up/logging in. - Available on Wi-Fi and networks. Data charges may apply when using 5G/LTE/3G. - Customer Center: cjoneglobal.cs@cj.net

About

Bill Letter

Manage various bills and benefits from paper or email in one smart app. Track real-time charges, payment history, and access exclusive offers. Reduce personal information exposure by receiving bills digitally.

Highlights
  • Consolidated bill management
  • Real-time charge tracking
  • Multiple payment options
  • Card point and dormant deposit inquiry
  • Personalized recommendations and events
  • Secure digital bill delivery
Features
Read full description

종이/이메일로 받아보던 각종 요금안내서와 다양한 혜택을 편리하고 스마트하게 관리하는 "요금안내서 Bill Letter" 우편 이메일로 받아보던 통신요금서, 카드명세서, 지방세(서울시), 도시가스 등 각종 청구서를 통합하여 관리할 수 있는 'Bill Letter'로 내 자산 관리부터 실시간 요금 조회, 생활 혜택까지 다양한 부가서비스를 경험하세요. [주요 기능] ■ 청구서를 신청하고 각종 청구서를 한 번에 관리 및 편리하게 납부하세요! - SK텔레콤 / SK브로드밴드 / 신용카드(삼성•하나카드) / 지방세(서울시) / 도시가스 / 현금영수증 - 카카오페이 / 네이버페이 / 토스페이 / 11pay 머니 / 계좌이체 / 체크,신용카드 / 11pay / OK캐시백 포인트 / 편의점QR 로 통신요금 납부 가능 ■ 실시간 요금 내역을 통해 이용패턴을 알 수 있어요! - 실시간 통신요금 / 데이터 사용량 조회 / 지난달 이용량 / 사용 요금제 조회 등 ■ 내 청구 요금을 한눈에 보실 수 있어요! - 통신요금 / 카드명세서, 지방세(서울시), 도시가스 등 각종 청구서 / 자동차 시세 조회 등 ■ 카드 포인트, 휴면예금 및 보험금 등 알찬 정보를 조회하실 수 있어요! - 카드 포인트, 휴면예금, 보험금, 자동차보험 과납 보험료 통합조회 등 ■ 빌레터 고객을 위한 맞춤추천과 이벤트를 함께 하세요! - 부가서비스 / 이벤트 / 추천정보 내 손안의 통신금융생활 'Bill Letter'를 통해 각종 청구서를 받아보세요. 우편물 도난 및 분실로 인한 개인정보 유출 가능성이 낮아 안전하고 편리하게 청구서를 통합하여 받아보실 수 있습니다. • 불편하신 사항은 고객센터 114로 문의하시면 신속한 도움드리겠습니다. [앱 접근 권한] - 알림(선택): 푸시 메세지 수신을 위해 필요한 권한입니다. - 동작 및 피트니스(선택) : 만보기 서비스에서 걸음 수를 측정하기 위해 필요한 권한입니다. - 생체인식정보(선택) : Touch ID(지문)/Face ID(얼굴) 인증 시 사용합니다. *앱 접근 권한 변경은 설정 > 애플리케이션에서 변경 가능 합니다. [유의 사항] - iOS 15 이상 버전 부터 서비스 이용이 가능합니다. - 원활한 이용을 위해, 단말기 OS와 앱을 최신 버전으로 업데이트 해주세요. - 3G, LTE, 5G 상에서 서비스 이용 시 데이터 통화료 요금이 발생할 수 있습니다.(SKT 이동전화에서 SKT/SKB 요금안내서 이용 시에는 데이터 통화료가 발생하지 않습니다.) - SKT, KT, LG U+ 회선 가입자만 이용이 가능합니다. (일부 MVNO 가입자는 이용할 수 있습니다.) - 가입 통신사, 개인 정보 보호 및 명의자 본인 여부에 따라 서비스 제공에 제한이 있을 수 있습니다. - SKT 요금안내서를 등록하시면 기존에 받아보시던 요금안내서 유형(우편, 문자 등)이 Bill Letter로 변경되며, 티월드에서 요금안내서 유형 변경을 하실 수 있습니다. - 제공되는 납부방식은 청구 회사에 따라 다를 수 있습니다. *개발자 연락처: +8215990011

Screenshots

CJ ONE4 screens
Bill Letter4 screens

Verdict

The call

The clearest difference is review sentiment: CJ ONE at 71% against Bill Letter's 36%. CJ ONE also leads on rating (3.5 vs 3.3). Bill Letter's advantage is ads (none vs shown) and monetization model (ad-supported vs free with in-app purchases). On price, ratings volume, update cadence and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CJ ONE holds the better App Store score, 3.5 against 3.3. Both are backed by a comparable volume of ratings — 37 and 15 respectively. Written reviews point the same way: 71% of CJ ONE's written reviews are positive against 36% of Bill Letter's.

UpkeepUpdate frequency

CJ ONE ships an update monthly, Bill Letter every 2 months. The most recent releases landed on October 27, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
CJ ONE versus Bill Letter: the parameters behind the verdict, then further details
ParameterCJ ONEBill Letter
PriceFreeFree
Rating3.5 (37 ratings) — better3.3 (15 ratings)
Positive reviews71.3% of reviews — better35.6% of reviews
Number of ratings37 — better15
Update frequencyMonthly — betterEvery 2 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size176 MB34 MB
Age rating4+4+
DeveloperCJ OliveNetworks Co., Ltd.SK Telecom

Customer experience

CJ ONE

All ratings37 ratings
Positive62.2%
Neutral5.4%
Negative32.4%
Written reviews94 reviews
Positive71.3%
Neutral7.4%
Negative21.3%

Bill Letter

All ratings15 ratings
Positive46.7%
Neutral20.0%
Negative33.3%
Written reviews59 reviews
Positive35.6%
Neutral13.6%
Negative50.8%

Bugs and requests

CJ ONE

Reported bugs

10 issues
  • App crashes on startup
  • App freezes
  • ARS authentication repeatedly required
  • App not updating
  • Gift card scratch number not visible
Show 5 more
  • App doesn't open after update
  • Background battery drain
  • App closes unexpectedly
  • Slow performance and overheating
  • Update fails

Requested features

5 requests
  • Change password rules
  • Email masking feature
  • Improve UI consistency
  • Fix ARS authentication issues
  • Improve gift card scratch number visibility

Bill Letter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

CJ ONE

No in-app purchases

None

Bill Letter

No in-app purchases

Questions

Is CJ ONE free?
CJ ONE is free to download, with no in-app purchases.
Is Bill Letter free?
Bill Letter is free to download, with no in-app purchases.
Which has better reviews, CJ ONE or Bill Letter?
CJ ONE is rated higher. CJ ONE averages 3.5 out of 5 from 37 ratings, while Bill Letter averages 3.3 from 15 ratings.
Do CJ ONE or Bill Letter have ads?
CJ ONE shows ads; Bill Letter does not.
Which is updated more often, CJ ONE or Bill Letter?
CJ ONE ships an update monthly, and Bill Letter every 2 months. Most recently, CJ ONE was updated on October 27, 2026 and Bill Letter on October 23, 2026.

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