Comparison

FIIL vs K

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

Head to head

About

FIIL

This app combines a diary, planner, and mood tracker to help you record your daily life and understand your emotions. It offers creative customization options and ensures your data is securely backed up and accessible across devices. Connect with friends or use it for personal reflection.

Highlights

Daily diary entries
Planner and calendar integration
Mood and emotion tracking
Customizable diary decoration
Daily Q&A prompts
Automatic cloud backup
Cross-device access

Features

Read full description

일기장과 플래너, 모든 기능을 한 번에 담았어요 :) 소중한 하루를 일기로 담아내고, 다꾸 기능으로 자유롭게 꾸며요! 매일 새로운 1문1답으로 나를 알아가요. 오늘 감정과 삶의 질을 기록하고 관리할 수도 있어요! 아, 일기 데이터가 사라지지 않도록 계정에 백업은 자동으로 되구요. 어플을 실수로 지웠다가 깔아도 당연히 상관 없구요. 급할 때 다른 기기에 로그인해서 언제든 이어서 쓸 수 있어요 :) 소중한 내 일기 데이터는 안전하게 보관되어요. 물론, 소중한 친구와 함께할 수도 있죠. 지금 바로 만나요 :) - 언제든 편하게 문의해주세요 - instagram: @fiilsociallab EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

K

Features

Read full description

k-buddy is a communication space for foreigners where you can ask questions about travel, life, language, public transportation, and more. You'll find it rewarding to share your experiences of living in Korea and help other foreigners.

Screenshots

FIIL4 screens

K4 screens

Verdict

The call

The clearest difference is in-app purchases: K at none against FIIL's 4. K also leads on iOS requirement (15.1 vs 17.0). FIIL's advantage is update cadence (every 5 days vs every 5 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FIIL sells 4 in-app purchases, starting at $0.99 per month. K asks for nothing beyond the download.

UpkeepUpdate frequency

FIIL ships an update every 5 days, K every 5 months. The most recent releases landed on October 9, 2026 and September 25, 2026 respectively.

Scorecard3 real differences · 5 level

FIIL versus K: the parameters behind the verdict, then further details
Parameter	FIIL	K
Price	Free	Free
Positive reviews	100.0% of reviews	—
Update frequency	Every 5 days — better	Every 5 months
Ads	No	No
In-app purchases	Yes	No — better
Monetization	Freemium	—
Devices	iPhone	iPhone, iPod — better
Requires iOS	17.0	15.1 — better
Further details — not scored
Size	117 MB	24 MB
Age rating	4+	17+
Developer	SeongYun Song	Suyong Choi