Oasis vs Fastology
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Oasis
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Professional hydration management powered by artificial intelligence. Machine learning algorithms analyze your hydration patterns, lifestyle, and physiological data. Receive evidence-based recommendations calibrated to your individual profile. Scientifically designed protocols help establish sustainable hydration habits. Track consistency through objective metrics. Data visualization provides insights into consumption patterns. Monitor daily, weekly, and monthly trends. Analyze beverage composition and timing distribution. Personalized advice based on physiological parameters. Optimal hydration schedules aligned with your circadian rhythm and activity patterns. Adaptive notifications at optimal times based on your behavioral patterns. Customize frequency and timing. Track measurable improvements in hydration compliance. Set goals based on WHO guidelines. Monitor long-term trends. Professional-grade hydration management committed to optimal health.
Fastology
This app provides structured tracking for intermittent fasting, going beyond simple timers. It helps users follow specific fasting schedules with clear phase progress, build consistency through streaks, and manage a flexible weekly plan. Focuses on discipline and reducing guesswork for a clearer fasting experience.
- Track various fast types (16:8, OMAD, extended)
- Live phase-by-phase progress tracking
- Build streaks from completed fasts
- Flexible weekly fasting schedule
- Review fasting history
- Ask fasting questions with reviewed answers
- Siri and Shortcuts integration
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Fastology is a fasting tracker for people who want more than a timer. Fasting works when it is structured. Fastology helps you track 16:8, 18:6, OMAD, and extended fasts with clear phase progress, streaks that reflect completed fasts, and a weekly schedule that fits real life. Most fasting apps count hours. Fastology helps you follow through. WHY FASTOLOGY Structured, not reactive Follow a clear fasting rhythm instead of making it up as you go. See where you are Track each phase of the fast with live progress, so you always know where you stand and what comes next. Consistency over intensity Build streaks from completed fasts and focus on repeatability, not random extremes. Flexible weekly schedule Set your fasting rhythm for the week, then adjust specific days when life changes. Clear, focused experience No clutter. No noise. Just the tools that matter when you want to fast with more discipline and less guesswork. WHAT YOU CAN DO • Track 16:8, 18:6, OMAD, and extended fasts • Follow live phase-by-phase progress • Build streaks from completed fasts • Set a weekly schedule and adjust specific days • Review your fasting history over time • Ask fasting questions with reviewed answers and linked sources • Start a fast, check your phase, or search Fastology from Siri, Spotlight, Shortcuts, and Ask • On supported devices, use Apple Intelligence to explore your fasting history Fastology is built for people who want to fast with more clarity, more structure, and more follow-through.
Screenshots
Verdict
Oasis and Fastology 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 | Oasis | Fastology |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | — | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 43 MB | 40 MB |
| Age rating | 12+ | 4+ |
| Developer | Andrei Pitunou | SmallScale Works LLC |
In-app purchases
Oasis
No in-app purchases
Fastology
No in-app purchases









