Comparison

Fast vs Nature

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

Head to head
About

Fast

Features
Read full description

Feel Better. Stay on Track. Your Fasting Journey, Made Simple. Build healthy habits and stay in tune with your bodyβ€”without the clutter or complexity. This beautifully simple app helps you track intermittent fasting in a calm, intuitive way that fits effortlessly into your daily routine. Why You’ll Love It: β€’ No accounts, no login, no tracking. Your data, your device. β€’ Gentle, Simple Tracking: Start and stop fasts with just a tap. No distractions, just a clear view of your progress. β€’ Apple Watch Ready: Track your fasts directly from your wristβ€”even without your phone nearby. β€’ At-a-Glance Insights: Stay mindful of your fasts with elegant widgets on your iPhone and Apple Watch. β€’ Private by Design: Your data is stored securely in your personal iCloud account. Nothing ever leaves your devices. Whether you’re fasting for wellness, focus, or energy, this app is your quiet companion on the journey.

About

Nature

Features
Read full description

Nature-Rx is a clinical evidence-based supplement database that puts peer-reviewed research at your fingertips. Search supplements, review drug interactions, explore dosing guidelines, and browse clinical studies β€” all backed by real data from sources like PubMed. **Evidence-Based Supplement Profiles** Browse detailed supplement entries with clinical data, evidence ratings, pharmacological reliability scores, and categorization across 18 supplement categories including Vitamins, Minerals, Adaptogens, and more. **Drug Interaction Checker** Look up known drug interactions for any supplement in the database. Each interaction includes severity ratings and clinical recommendations to help inform your conversations with healthcare providers. **Therapeutic Guide** Search by health condition to find evidence-graded dosing information across all supplements. Each indication includes dosage amounts, target populations, and evidence grades drawn from clinical literature. **Research Library** Browse and filter clinical studies linked to supplements, with evidence levels and source citations. Stay informed with the latest research backing each product. **Barcode Scanner and Drug Watchlist** Scan a supplement bottle's barcode to see its label and jump to matching supplement profiles, or scan your whole stack in one go. Add the medications you take to your watchlist, and Nature-Rx flags known interactions with them, including matches by drug class. **Personalized Features** Bookmark supplements and scanned products for quick access. Secure your account with Face ID or Touch ID. View your profile and manage preferences with ease. Privacy Policy: https://naturerx.app/privacy Terms of Use (EULA): https://naturerx.app/terms

Screenshots

Fast4 screens
Nature4 screens

Verdict

The call

The clearest difference is in-app purchases: Fast at none against Nature's 2. Fast also leads on update cadence (every 2 weeks vs every 3 months). Nature's advantage is iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Nature sells 2 in-app purchases, starting at $19.99 per 6 months. Fast asks for nothing beyond the download.

UpkeepUpdate frequency

Fast ships an update every 2 weeks, Nature every 3 months. Both last shipped on October 30, 2026.

Scorecard3 real differences Β· 3 level
Fast versus Nature: the parameters behind the verdict, then further details
ParameterFastNature
PriceFreeFree
Update frequencyEvery 2 weeks β€” betterEvery 3 months
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS26.015.0 β€” better
Further details β€” not scored
Size35 MB36 MB
Age rating4+17+
DeveloperCodeHiveJP HowardMD Inc

In-app purchases

None

Fast

No in-app purchases

2 purchases

Nature

Subscriptions2
  • Premium Semiannual1 Month trial$19.996 Months
  • Premium Annual2 Months trial$29.991 Year

Questions

Is Fast free?
Fast is free to download, with no in-app purchases.
Is Nature free?
Nature is free to download, with in-app purchases available.
Do Fast or Nature have ads?
Neither Fast nor Nature shows ads.
Which is updated more often, Fast or Nature?
Fast ships an update every 2 weeks, and Nature every 3 months. Most recently, Fast was updated on October 30, 2026 and Nature on October 30, 2026.

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