Comparison

완충e vs 덤즈

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

Head to head
About

완충e

This service allows users to easily rent and return portable chargers via QR code. Simply rent when needed, and return the charger after use without needing the app for the return process.

Highlights
  • QR code rental
  • Easy return
  • On-demand battery charging
  • Convenient service
Features
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QR코드로 쉽게 대여하고 간편하게 반납하는 보조배터리 대여 서비스. '완충이'는 여러분이 원할때 언제 어디서든 빠르게 배터리를 대여 할 수 있고 충전 후 APP을 사용하지 않고 그냥 반납만 해주시면 됩니다.

About

덤즈

Features
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덤즈와 함께라면 매일이 신나는 주말! 문 앞까지 가야 알 수 있는 클럽 입장료, 나만 몰랐던 공연 소식. 이제 덤즈에서 가장 빠르고 확실하게 확인하세요. 클럽·라운지 정보 ● 지역별 클럽 정보 및 길찾기 ● 실시간 입장료 정보 확인 ● 드레스코드, 보관함, 흡연 안내 ● 영업 시간 및 오픈 상태 확인 나만을 위한 전용 쿠폰 혜택 ● 프리드링크, 무료입장 등 단독 쿠폰 혜택 전국 클럽·라운지 공연·파티·페스티벌 정보 ● 클럽 게스트, 아티스트 공연 캘린더 ● 트렌딩한 파티·페스티벌 정보 모아보기 저장 및 공유 ● 좋아요 표시한 클럽·라운지·페스티벌 다시 보기 ● 클럽·라운지·공연·파티·페스티벌 정보 친구에게 공유 해외 클럽 정보 ● 발리, 일본, 태국 클럽은 어떻게 가야 해? 걱정 끝! 덤즈에서 확인할 수 있어요. (출시 예정) 꼭 필요한 권한만 요청할게요. [선택] 위치 획득 권한: 내 주변 클럽 정보 확인을 위해 필요 고객문의: dumbs.app.official@gmail.com 인스타그램: https://www.instagram.com/dumbs_app

Screenshots

완충e4 screens
덤즈4 screens

Verdict

The call

The clearest difference is iOS requirement: 완충e at 13.0 against 덤즈's 18.0. On price, update cadence, ads 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.

UpkeepUpdate frequency

완충e ships an update weekly, 덤즈 every 2 weeks. The most recent releases landed on November 3, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
완충e versus 덤즈: the parameters behind the verdict, then further details
Parameter완충e덤즈
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews12.5% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size63 MB35 MB
Age rating4+17+
Developer에브리포터블(주)DUMBS

Bugs and requests

완충e

Reported bugs

8 issues
  • Login authentication failures (Kakao, Naver)
  • Payment gateway errors (card registration, payment failure)
  • Batteries not charging or showing as charging when they are not
  • Return process not registering, leading to extra charges
  • App crashes or errors preventing usage
Show 3 more
  • Authentication code timeout issues
  • Inaccurate billing or unexpected charges
  • Spam calls originating from app usage

Requested features

10 requests
  • Improve login system stability
  • Fix payment processing errors
  • Ensure battery quality before rental
  • Provide clearer return instructions/confirmation
  • Improve customer service availability and responsiveness
Show 5 more
  • Offer better pricing or clearer fee structures
  • Allow registration of check cards
  • Display battery charge level before rental
  • Allow in-app reporting of faulty batteries
  • Simplify the app onboarding process

덤즈

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

완충e

No in-app purchases

None

덤즈

No in-app purchases

Questions

Is 완충e free?
완충e is free to download, with no in-app purchases.
Is 덤즈 free?
덤즈 is free to download, with no in-app purchases.
Do 완충e or 덤즈 have ads?
Neither 완충e nor 덤즈 shows ads.
Which is updated more often, 완충e or 덤즈?
완충e ships an update weekly, and 덤즈 every 2 weeks. Most recently, 완충e was updated on November 3, 2026 and 덤즈 on October 24, 2026.

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