워터리움 vs Fasting Notebook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
워터리움
This app combines water drinking habit tracking with a virtual aquarium. Log your water intake to fill your aquarium, hatch eggs with pearls, and collect unique fish to create a personalized underwater world. Stay hydrated with cute reminders and enjoy mini-games while building a healthy habit.
- Log water intake to fill aquarium
- Hatch eggs with pearls to collect fish
- Decorate and feed fish
- Aquarium grows with consistent use
- Monthly habit calendar and streak tracking
- Water drinking reminders
- Mini-games and hidden events
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물 마시는 게 이렇게 귀여워도 될까요? 워터리움은 '물 마시기 습관'과 '어항 키우기'를 합친 힐링 앱이에요. 물을 한 잔 마실 때마다 어항에 물이 차오르고, 모은 진주로 알을 부화시켜 나만의 파스텔 3D 바다를 채워갈 수 있어요. 바쁜 하루, 깜빡하기 쉬운 수분 섭취를 가장 사랑스러운 방법으로 챙겨보세요. ■ 이렇게 즐겨요 · 물·생수를 마시고 기록하면 어항에 물이 차오르고 진주를 받아요 · 진주로 알을 부화시켜 물고기를 수집해요 (제주 바다 + 산호초, 39종) · 데코로 어항을 꾸미고, 물고기에게 밥도 줄 수 있어요 · 꾸준히 출석하면 어항이 3단계까지 물리적으로 커져요 · 어항이 탁해지면 물을 마시거나 청소해서 맑게 유지해요 ■ 습관을 지켜주는 기록 · 월간 습관 캘린더로 '내가 얼마나 꾸준했나'를 한눈에 · 연속 달성(스트릭) · 목표 달성일 표시 · 주간/월간 요약 · 물 마시기 알림으로 잊지 않게 ■ 소소한 재미 · 쿨타임 사이 즐기는 미니게임 3종 · 특별한 조건에서만 나타나는 희귀·전설 생물 · 밤에 찾아오는 '해녀의 선물' 같은 히든 이벤트 ■ 안심하고 쓰세요 · 회원가입 없음 · 완전 무료 오늘도 나를 위한 물 한 잔, 그리고 자라나는 나만의 어항
Fasting Notebook
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Tap Start fast, and the timer counts your fasted time from that moment. Fasting Notebook is a timer and log for intermittent fasting. Set a goal of up to 7 days. When you pass the goal, the timer keeps counting until you end the fast. You do not need an account. Install it and start. ■ Undo a wrong tap • Started by mistake? Undo it right after you tap Start fast • Ate a while ago? Choose “Already started” to begin 15 minutes, 30 minutes, 1 hour or 2 hours back • During a fast, you can change the start time and the goal • Forgot to end a fast? Fix the end time afterward • Delete a fast you started by mistake with “Delete without logging” • Ended a fast too early? Tap Resume to keep counting the fast you just ended ■ From 12:12 to one meal a day, up to 7 days • Plans for 12:12, 14:10, 16:8, 18:6, 20:4, one meal a day (23:1), and 36, 48 and 72 hours • Set your own length, or time a fast without a goal • New to fasting? Answer three questions to see a recommended plan • Schedule fasts for every day, certain weekdays or every few days, with reminders for 5:2 low-calorie days • Goals longer than 24 hours ask for your confirmation before you start ■ See which hour you are on • A ring divided into stage ranges, with your elapsed time • Time left to your goal, and time past it • Each stage has reference information to read. It is not medical advice ■ Lock Screen and Home Screen widgets • The widget shows your elapsed time without opening the app • During a fast, a Live Activity appears on the Lock Screen and in the Dynamic Island. You can turn it off in Settings ■ Log and stats • A calendar of your fasts and your streak • Stats for 7, 30 and 90 days: average and longest fast, goal completion rate and mood • Log weight, body fat and muscle mass, with charts • Body photos collected by date, so you can compare them • Carry over the days and fasting hours you built in another app ■ Meals, exercise and water • Log breakfast, lunch, dinner and snacks with calories, carbs, protein, fat and sugars for each food, plus amount, photo and note • Foods you eat often are remembered, so you can add them with a tap • Log exercise from 10 types. Calories used are estimated from your weight and the intensity • Log water, tea, coffee and sparkling water, with a daily water goal you set • See calories eaten, estimated calories used in exercise and nutrient shares in Stats • Calories are estimates, worked out from the profile and weight you enter with a standard formula ■ Reminders • When you reach your goal, 1 hour before it, when a scheduled fast starts, and when you forgot to start • Reminders to drink water and to log your weight • “Send test notification” checks that reminders reach you ■ No account. Your logs stay on your device. • Your fasts, meals, weight and photos are saved only on this device • Save everything, photos included, to a backup file and restore it on a new device. You can also export CSV for spreadsheets • Health app sync works only when you turn it on. Weight, water and exercise are exchanged with Apple Health, and permission is requested when you turn it on • Choose a 12-hour or 24-hour clock • App lock with a PIN or Face ID • There are no in-app purchases ■ Please read Stage descriptions are for reference and are not medical advice. Calories are estimates. If you are pregnant or nursing, have a medical condition or take medication, talk to your doctor before you start. The app is not meant for people under 18. If you feel dizzy or notice anything unusual, stop right away. Use it at your own pace. Contact: fasting@hyunjins.co.kr
Screenshots
Verdict
The clearest difference is ads: Fasting Notebook at none against 워터리움's shown. Fasting Notebook also leads on update cadence (daily vs every 2 weeks). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
워터리움 ships an update every 2 weeks, Fasting Notebook daily. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.
| Parameter | 워터리움 | Fasting Notebook |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 — better | 15.5 |
| Further details — not scored | ||
| Size | 78 MB | 29 MB |
| Age rating | 4+ | 12+ |
| Developer | HYEKYUNG MOON | Hyunjin Jang |
In-app purchases
워터리움
No in-app purchases
Fasting Notebook
No in-app purchases





