Comparison

Iron vs Absorb

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

Head to head
About

Iron

Track your dietary iron intake with this simple and elegant app. It offers seamless logging, personalized schedules, smart reminders, and integrates with Apple Health. Your data is private and securely backed up via iCloud, with no ads or logins required.

Highlights
  • Seamless intake tracking
  • Full Apple Health integration
  • Automatic iCloud backups
  • Science-based personalization
  • Smart reminders
  • Custom daily intake schedule
Features
Read full description

Simple and elegant dietary iron tracker for your watch. Apple Health integration. iCloud backups. Schedule & reminders. No login. No ads. Free. ■ FEATURES • Seamless intake tracking • Full Apple Health integration • Automatic, secure iCloud backups • Trusted data from the U.S. National Institutes of Health • Science-based personalization by age and gender • Sync across all your Apple devices • Effortless history review • Smart reminders to stay on track • Custom daily intake schedule • No ads, no login, no in-app purchases • 100% free ■ SAFE AND SECURE Privacy is not something you are merely entitled to, it is an absolute prerequisite. At Martspec, we believe privacy is a fundamental human right. So we built it into our products from the beginning of the design process. We do not share your data with any 3rd party. We do not use it for advertisement purposes and do not use it for profit. Your data is stored only on your Apple service (Apple Health store and iCloud). We do NOT store your data on our servers. ■ DISCLAIMER The nutritional information provided in this app is sourced from the U.S. National Institute of Health and the book “Nutrition for Health and Health Care,” 3rd Edition, by E. Whitney. This content is designed strictly for educational purposes and should NOT replace professional medical advice, diagnosis, or treatment. Your use of this application is entirely at your own discretion and risk. The app is made available to you “as is” and “as available,” without any representations or warranties of any kind. While we strive for excellence in our software development, Martspec cannot guarantee that the app will be free from errors or defects. Martspec expressly disclaims all warranties, whether express or implied, including, but not limited to, implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the app, or any content provided through it, will always be available, uninterrupted, timely, secure, current, accurate, complete, or error-free. You acknowledge that your exclusive remedy for any dissatisfaction or issues with the app is to discontinue its use. Martspec shall not be liable for any direct, indirect, incidental, special, consequential, or exemplary damages, including but not limited to, damages for loss of profits, goodwill, use, data, or other intangible losses resulting from the use or inability to use the app. ■ BUILD TOGETHER At the heart of everything we do is one simple goal: to help you feel and live better every day. Our mission is to expand human potential by merging cutting-edge technology, beautifully crafted design, and the insights you share directly with us. We ground our work in science—leveraging trusted research and real-world data—while it’s your feedback that guides our journey forward. This isn’t just an app; it’s a shared experience. We’re a passionate team of creators, and you’re the co-pilot. Every idea, suggestion, and request helps us build smarter features, refine your experience, and eliminate what doesn’t serve you. Together, we’re crafting a tool that evolves with you to make daily life smoother and more vibrant.

About

Absorb

Log your daily supplements, identify potential conflicts, and discover synergistic combinations for better absorption. Optimize your vitamin and mineral intake with research-backed guidance and personalized insights.

Highlights
  • Daily supplement logging
  • Conflict warnings
  • Synergy insights
  • Absorption tips
  • Smart reminders
  • Supplement library
Features
Read full description

Are your supplements canceling each other out? Absorb helps you log your daily stack, spot harmful interactions before you take them, and discover combinations that work better together — so you get more from every capsule. Most trackers only count pills. Absorb analyzes how your vitamins and minerals interact: iron vs. calcium, zinc competition, vitamin C boosting iron absorption, and more — based on research-backed guidance. TRY ABSORB PRO FREE FOR 3 DAYS Start your 3-day free trial and unlock the full Absorb experience. Choose monthly after your trial or pay once for lifetime access — one subscription, no limits on your stack. YOUR PERSONALIZED SUPPLEMENT ASSISTANT Whether you manage iron or vitamin D, build an athlete stack, or simply want a safer daily routine, Absorb keeps your stack clear, consistent, and optimized. KEY FEATURES • Daily supplement logging — Build your stack in seconds and see what you took today • Conflict warnings — Know when combinations reduce absorption or don't belong together • Synergy insights — Find pairs that boost effectiveness (e.g. iron + vitamin C, D + K2) • Absorption tips — Practical timing and food guidance for each supplement • Smart reminders — Stay consistent with scheduled notifications • Supplement library — Browse vitamins, minerals, and common stack items • Light & dark mode — Clean, fast interface that stays out of your way WHY ABSORB IS DIFFERENT Taking supplements isn't only about what you take — it's about timing, pairing, and absorption. Absorb is built for people who want results, not guesswork. ABSORB PRO Absorb Pro includes everything you need for a smarter stack: • Unlimited daily logging • Full conflict & synergy alerts on your Today view • Complete supplement library • Unlimited smart reminders Start your 3-day free trial on the monthly plan, or choose lifetime access. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Stop guessing if your stack is working against you. Download Absorb and build a smarter, safer, more effective routine. — Medical disclaimer: Absorb is for educational and tracking purposes only. It does not provide medical advice. Always consult a healthcare professional before changing your supplement regimen. Privacy Policy: https://absorb.weblak.net/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Absorb3 screens

Verdict

The call

The clearest difference is rating: Iron at 5.0 against Absorb's 4.0. Iron also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 16.4). Absorb's advantage is update cadence (every 5 weeks vs every 3 months). On price, ratings volume, 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. Absorb sells 2 in-app purchases, starting at $9.99 per month. Iron asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Iron holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Iron ships an update every 3 months, Absorb every 5 weeks. The most recent releases landed on September 21, 2026 and July 27, 2026 respectively.

Scorecard5 real differences · 5 level
Iron versus Absorb: the parameters behind the verdict, then further details
ParameterIronAbsorb
PriceFreeFree
Rating5.0 (1 ratings) — better4.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size7 MB60 MB
Age rating12+17+
DeveloperMartspec LLCSouhayb Kamal Dine

Customer experience

Iron

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Absorb

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Iron

No in-app purchases

2 purchases

Absorb

Subscriptions1
  • Absorb Pro - Monthly3 Days trial$9.991 Month
One-time1
  • Absorb pro Lifetime$19.99

Questions

Is Iron free?
Iron is free to download, with no in-app purchases.
Is Absorb free?
Absorb is free to download, with in-app purchases available.
Which has better reviews, Iron or Absorb?
Iron is rated higher. Iron averages 5.0 out of 5 from 1 ratings, while Absorb averages 4.0 from 1 ratings.
Do Iron or Absorb have ads?
Neither Iron nor Absorb shows ads.
Which is updated more often, Iron or Absorb?
Iron ships an update every 3 months, and Absorb every 5 weeks. Most recently, Iron was updated on September 21, 2026 and Absorb on July 27, 2026.

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