Comparison

Days vs Longevity.AI

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

Head to head
About

Days

Features
Read full description

Days – Live Longer is your personal habit tracker designed to help you live a longer, healthier life. Based on scientific research, our app helps you track the habits that have the biggest impact on your longevity. Features: • Live countdown in Days, Hours, Minutes, Seconds • Daily habit check‑ins for life builders and life drains • Habit impact chart and insights • Reminders that keep you on track • Home screen widgets at a glance Days Pro: • Track all habits • Widgets unlocked Privacy: All data stays on your device. No account required. **Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/** Note: This app is for wellness tracking and is not medical advice.

About

Longevity.AI

This platform offers a comprehensive longevity toolkit, featuring an AI advisor, dose calculator, and an extensive library of compounds backed by scientific research. Track your progress with wellness scores, daily check-ins, and body composition analysis, all while syncing with Apple Health.

Highlights
  • AI Advisor for compound and protocol queries
  • Precision dose calculator
  • 100-compound library with PubMed citations
  • Wellness score and adherence analytics
  • Body composition and daily tracking
  • Apple Health integration
Features
Read full description

Longevity.AI is a comprehensive longevity platform built for your phone. 100 compounds across 10 categories. 200+ peer-reviewed studies with PubMed citations. Built for the next generation of health-conscious individuals who refuse to settle for spreadsheet-grade tools. WHAT YOU GET - AI Advisor — Ask anything about compounds, protocols, dosing, timing, or your stack. Draws on a 100-compound knowledge base and 200+ peer-reviewed studies. - Dose Calculator — Precision reconstitution math, syringe unit conversions, and dose-per-vial visualization. - Compound Library — 100 compounds across 10 categories: GLP-1 agonists, peptides, GH secretagogues, longevity pharmaceuticals, hormonal optimization, mitochondrial peptides, NAD+ pathway, senolytics, cognitive nootropics, immune modulators. - 200+ Peer-Reviewed Studies — Compounds backed by PubMed citations. No bro-science. - Wellness Score — Composite health metric blending adherence, sleep, energy, and consistency. - Daily Check-Ins — Log energy, sleep, and mood in seconds. - Body Composition Tracking — Photos, measurements, and progress over time. - Apple Health Sync — Steps, weight, and sleep flow in automatically (read-only). - Journal — Note observations and protocol adjustments. - Adherence Analytics — Visual feedback on your weekly consistency. WHY LONGEVITY.AI Most longevity tools are spreadsheets dressed up as apps. Longevity.AI is built different. Premium design. Science-backed library. AI guidance grounded in a research-linked compound library. Compounds in our library are supported by peer-reviewed clinical research, with PubMed citations. No anecdotes, no marketing fluff — just the data you need to make informed decisions about your longevity stack. WHO THIS IS FOR Athletes optimizing recovery. Founders maximizing cognitive performance. High-performers who want to track their health with precision. Anyone serious about healthspan, not just lifespan. This app is for educational and research purposes only. It does not provide medical advice, diagnosis, or treatment. Always consult a licensed physician before starting any protocol. SUBSCRIPTION TIERS - Weekly: $4.99 first week, then $12.99/week - Monthly: $24.99/month - Annual: $99/year (best value) Prices shown in USD. Local pricing varies by region and is displayed in the app. Cancel anytime in your Apple ID Settings. Restore Purchases available in app. PRIVACY Your personal health data is stored locally on your device. We never sell your data. Email addresses are used only for transactional emails. AI Advisor conversations are processed by Anthropic, our third-party AI provider. Privacy: longevityai.io/privacy Terms: longevityai.io/terms Live longer. Live better.

Screenshots

Days3 screens
Longevity.AI4 screens

Verdict

The call

The clearest difference is in-app purchases: Longevity.AI at none against Days's 1. Longevity.AI also leads on iOS requirement (15.1 vs 17.0). Days's advantage is update cadence (every 2 days vs every 2 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. Days sells 1 in-app purchase, starting at $1.99 per month. Longevity.AI asks for nothing beyond the download.

UpkeepUpdate frequency

Days ships an update every 2 days, Longevity.AI every 2 months. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Days versus Longevity.AI: the parameters behind the verdict, then further details
ParameterDaysLongevity.AI
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 2 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
Monetization—Subscription
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size10 MB29 MB
Age rating12+17+
DeveloperIBRAHIM HADDADMyles Stute

In-app purchases

1 purchases

Days

Subscriptions1
  • Days PRO$1.991 Month
None

Longevity.AI

No in-app purchases

Questions

Is Days free?
Days is free to download, with in-app purchases available.
Is Longevity.AI free?
Longevity.AI is free to download, with no in-app purchases.
Do Days or Longevity.AI have ads?
Neither Days nor Longevity.AI shows ads.
Which is updated more often, Days or Longevity.AI?
Days ships an update every 2 days, and Longevity.AI every 2 months. Most recently, Days was updated on October 24, 2026 and Longevity.AI on October 31, 2026.

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