IU I vs 4em
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IU I
This application synchronizes with IU music videos and content, allowing your official lightstick to be controlled for a personalized concert experience anywhere. Show your support by waving your lightstick in time with the music.
- Lightstick synchronization with music videos
- Personalized concert experience
- Fan support tool
- Online exclusive service
Read full descriptionHide full description
아이유 응원봉 공식 온라인 서비스 애플리케이션 아이유 뮤직비디오 및 영상 싱크에 맞춰 공식응원봉이 컨트롤되는 온라인 전용 서비스 입니다. 언제 어디서든 당신만을 위한 작은 콘서트가 시작됩니다. 팬분들의 마음을 담아 응원봉을 흔들어주세요!
4em
Read full descriptionHide full description
AI가 써주는 위치별 특별한 시 한 구절 / 시로 기억될 당신의 장소, 4em 심리테스트도, 게임도 질렸는데.. 친구랑 뭐해볼 거 없나? 오, 내가 서있는 장소를 나타내는 단어가 있고 그걸 시로 보여준다고..? 4em은 여러분의 장소를 시로 제작해 줍니다. 여러분만을 위한 장소를 담은 아름다운 시를 4em에서 공유해 보세요!
Screenshots
Verdict
IU I and 4em are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | IU I | 4em |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (13 ratings) — better | — |
| Positive reviews | 72.7% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 18 MB | 20 MB |
| Age rating | 9+ | 4+ |
| Developer | Sang Min Jo | Yunsu Guk |
In-app purchases
IU I
No in-app purchases
4em
No in-app purchases
