Comparison

天使と悪魔のファスティング vs Kyoukara

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

Head to head
About

天使と悪魔のファスティング

Features
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Fast at your pace on a quiet island. Fasting Island is an intermittent fasting timer with two very different companions on your shoulders. The angel cheers you on, the devil tempts you to stop, and sometimes they both break character. Their playful banter keeps fasting from feeling too serious. SIMPLE FASTING TIMER Choose a 12:12, 14:10, or 16:8 plan. Start and finish with a tap, check elapsed time and goal progress, and adjust the start time later if needed. SIX FASTING STAGES Follow an easy-to-read guide through six estimated stages, from digestion and steadier blood sugar to fat use, ketosis, and autophagy-related repair. Stage timing is educational and may vary from person to person; it is not a medical measurement. ANGEL & DEVIL COMPANIONS Get encouragement from one shoulder and comic temptation from the other. Choose male or female character versions and enjoy occasional role reversals. HISTORY & STATISTICS Keep your fasting history without a time limit. Review recent sessions, totals, longest and average fasts, view a weekly chart, and export your records as CSV. OFFLINE AND PRIVATE The timer and on-device records work without an internet connection. No account is required, and your records stay on your device. SAFETY Fasting Island supports healthy routines but does not provide medical advice. Stop if you feel unwell. It is not recommended during pregnancy or for people with a history of eating disorders. If you have a medical condition or take medication, consult a qualified healthcare professional before fasting.

About

Kyoukara

Features
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Today, your sober day begins. A gentle companion notebook for people who want to change their relationship with alcohol — quit drinking, cut back, or stay mindful. Hokuto, an owl mascot, quietly stays with you through the nights when temptation is strongest. KEY FEATURES Day Counter The number of days since you started sits front and center on your home screen. Today is Day N — the only number that matters. Money Saved Enter how much you used to spend per day. Kyoukara automatically calculates your cumulative savings, turning "the choice not to drink" into a tangible value you can see growing. Emergency Craving Cards (5 free) When the urge hits, tap the red button on home. Five cards offer 5-minute responses: drink water, walk outside, 4-7-8 breathing, look Hokuto in the eye, count to 100. Cravings come in waves — and they pass. One-Sentence Diary Write three lines about today, choose how you felt (calm / anxious / tempted / proud), and save. Looking back, your journey is right there in your own words. 14-Night Reflection Prompts A short date-based prompt gives you an easy way to begin writing. Insert the prompt into your entry and answer it in your own words. Hokuto's Expressions The owl's expression shifts gently based on your day count. On Day 1-3 it watches over you carefully. After a month, its quiet pride is unmistakable. Milestones Day 1 "First Morning" / Day 7 "Seven-Day Dawn" / Day 30 "Month of the Moon" / Day 100 "Star of a Hundred" / Day 365 "Sky of a New Year". A progress bar to the next milestone keeps each day grounded. Reset Without Shame The relapse button doesn't say "failed." It says "begin again, with Hokuto." A single stumble is not the end. The app is designed for the long road. KYOUKARA PRO (one-time purchase) 30 Craving Cards — Tea, shower, calling someone, stretching, sweet snacks, cold water, future-self imagining. 25 additional response cards added to the free 5. Detailed Statistics — Mood trends, relapse history, cumulative savings analysis. Temptation-Hour Reminders — Custom notifications from Hokuto at the times you tend to crave most (e.g. Friday nights at 9pm). Photo Diary — Attach today's single photo alongside your one-sentence note. PDF Export — Generate clean records to share with a doctor or counselor. Kyoukara Pro is a one-time purchase. There are no subscriptions and no auto-renewal — buy it once and it's yours. WHO IT'S FOR - Anyone wanting to change their relationship with alcohol - People who've said "I'll quit tomorrow" too many times - Those who want to move forward one day at a time - Anyone seeking a "you're not alone" feeling at tempting hours PRIVACY Everything is processed on-device. No data leaves your phone. No account required. This app does not provide medical or treatment advice — it is a journal for personal record-keeping. With Hokuto, today, your sober day begins. ---- - Privacy Policy: https://starcrown.co.jp/privacy - Terms of Service: https://starcrown.co.jp/legal - Support: https://starcrown.co.jp/support - Contact: w-yonamine@starcrown.co.jp

Screenshots

天使と悪魔のファスティング4 screens
Kyoukara4 screens

Verdict

The call

The clearest difference is in-app purchases: 天使と悪魔のファスティング at none against Kyoukara's 4. Kyoukara's advantage is ads (none vs shown). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kyoukara sells 4 one-off in-app purchases. 天使と悪魔のファスティング asks for nothing beyond the download.

UpkeepUpdate frequency

天使と悪魔のファスティング ships an update every 10 days, Kyoukara every 5 days. The most recent releases landed on September 13, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 4 level
天使と悪魔のファスティング versus Kyoukara: the parameters behind the verdict, then further details
Parameter天使と悪魔のファスティングKyoukara
PriceFreeFree
Update frequencyEvery 10 daysEvery 5 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size51 MB20 MB
Age rating17+17+
DeveloperRYOJI TAKAHASHIStarcrown Inc

In-app purchases

None

天使と悪魔のファスティング

No in-app purchases

4 purchases

Kyoukara

One-time4
  • Kyoukara Tea Tip$0.99
  • Kyoukara Lunch Tip$1.99
  • Kyoukara Pro$3.99
Show 1 more
  • Kyoukara Dinner Tip$5.99

Questions

Is 天使と悪魔のファスティング free?
天使と悪魔のファスティング is free to download, with no in-app purchases.
Is Kyoukara free?
Kyoukara is free to download, with in-app purchases available.
Do 天使と悪魔のファスティング or Kyoukara have ads?
天使と悪魔のファスティング shows ads; Kyoukara does not.
Which is updated more often, 天使と悪魔のファスティング or Kyoukara?
天使と悪魔のファスティング ships an update every 10 days, and Kyoukara every 5 days. Most recently, 天使と悪魔のファスティング was updated on September 13, 2026 and Kyoukara on September 24, 2026.

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