Comparison

StackDay vs Supplement Inventory

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

Head to head
About

StackDay

This app helps you consistently take your vitamins and supplements. Log doses, build streaks, and view your adherence over time. It offers smart reminders and pre-loaded supplement information to make tracking easy.

Highlights
  • Daily checklist for all supplements
  • 50+ pre-loaded supplements
  • Streak and adherence statistics
  • Customizable smart reminders
  • Local data storage for privacy
  • Home screen widget (Pro)
Features
Read full description

StackDay is the supplement and peptide tracker that finally makes you consistent — check off doses in one tap, watch your streak grow, and see which stacks actually work. NEW: PEPTIDES + PROTOCOLS A dedicated Peptides tab for BPC-157, TB-500, semaglutide, retatrutide, and every peptide in between. • Vial tracking with a 28-day reconstitution countdown • Titration schedules that auto-step your dose week by week for GLP-1s • Active-level curves (Pro) — see estimated compound levels between doses so you know when the next one is really due RECONSTITUTION CALCULATOR Enter your vial strength and BAC water; get exact U-100 syringe units instantly. Reverse mode lets you dial a target dose and see the water to add — no more scribbling on the back of a bottle. INJECTION SITE ROTATION A tappable body map covering all 8 subQ sites. Auto-suggests the most-rested spot every time you log a dose, so you never accidentally double up. DAILY CHECKLIST Your entire stack in one screen, split by morning, meal, afternoon, pre-workout, evening, and bedtime. Tap to check off each supplement. Satisfying haptics every time. 1,000+ SUPPLEMENT LIBRARY Vitamins, minerals, adaptogens, nootropics, mushrooms, and performance compounds — all pre-loaded with common dosages and units. Add your full stack in 30 seconds. Scan any label with your camera (Pro). STREAKS, QUESTS, AND BADGES • 24 illustrated achievement badges spanning streaks, logging milestones, peptides, and exploration • 3 weekly quests that rotate on a fresh cycle every week • Streak Freezes bank automatically at milestones and protect a missed day — because life happens INTERACTIVE WIDGETS • Medium Home Screen widget with tap-to-check-off buttons — mark doses without opening the app • Small widget and Lock Screen widgets for at-a-glance progress • Peptide widget showing your next dose and vial countdown • Mark doses taken right from notifications INTERACTION AWARENESS 16 built-in interaction checks (calcium and iron, coffee and ashwagandha, and more). Timing suggestions space competing supplements hours apart so absorption doesn't fight itself. PROGRESS THAT MEANS SOMETHING • 30-day adherence per supplement — see your true best performers • Monthly heatmap calendar • Wellness correlation (Pro) — spot which supplements actually move your mood, energy, sleep, and focus • Apple Health integration for sleep, steps, and workouts STACKDAY PRO • Unlimited history and full per-supplement stats • Active-level curves for peptides • Custom reminder times for every one of the 8 slots • Label scanner and AI Supplement Advisor • Wellness correlation insights and weekly recaps Free tier includes full daily tracking, 7-day history, slot reminders, and the reconstitution calculator. NOW IN 6 LANGUAGES English, German, Spanish, French, Portuguese, and Japanese — with more on the way. PRIVATE BY DESIGN Your data stays on your iPhone. No account required. Everything is stored locally. Built for anyone who spends money on supplements and peptides but never sees the payoff because they can't stay consistent. Every dose logged. Every streak counted. Every stack proven. Privacy Policy: https://foggy-labs.github.io/privacy/stackday Terms of Use: https://foggy-labs.github.io/terms Support: https://foggy-labs.github.io/support

About

Supplement Inventory

Easily manage your supplement intake by scanning barcodes to add items to your digital cabinet. Track daily servings and monitor specific macros with detailed charts. Automatically sync your nutritional data with Apple Health to stay organized and hit your fitness goals.

Highlights
  • Barcode scanning for easy addition
  • Digital supplement cabinet
  • Daily serving tracking
  • Macro monitoring (protein, creatine)
  • Detailed nutritional charts
  • Apple Health synchronization
Features
Read full description

Manage your entire supplement inventory with a single tap. Easily scan barcodes to add protein powders, vitamins, and pre-workouts to your personal digital cabinet. Track your daily servings, monitor specific macros like protein or creatine through detailed charts, and automatically sync your nutritional data with Apple Health. Whether you want to know when it's time to restock your favorites or just want to hit your daily goals, this app keeps your fitness journey perfectly organized.

Screenshots

StackDay4 screens
Supplement Inventory4 screens

Verdict

The call

The clearest difference is price: StackDay at Free against Supplement Inventory's $0.99. StackDay also leads on rating (5.0 vs 1.0) and ratings volume (5 vs 1). Supplement Inventory's advantage is in-app purchases (none vs 8) and ads (none vs shown).

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

StackDay is free to download; Supplement Inventory costs $0.99 up front. StackDay sells 8 in-app purchases, starting at $0.99 per 7 days. Supplement Inventory asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

StackDay holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: StackDay has 5 ratings behind it against 1, so its average is the more settled of the two.

Scorecard8 real differences · 2 level
StackDay versus Supplement Inventory: the parameters behind the verdict, then further details
ParameterStackDaySupplement Inventory
PriceFree — better$0.99
Rating5.0 (5 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings5 — better1
Update frequencyEvery 3 days—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size20 MB30 MB
Age rating12+4+
DeveloperFog Hill, LLCBatikan Bozkurt Kursat

Customer experience

StackDay

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Supplement Inventory

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

8 purchases

StackDay

Subscriptions8
  • Pro Weekly Discount3 Days trial$0.997 Days
  • Pro Weekly3 Days trial$1.997 Days
  • Pro Monthly Discount$3.991 Month
Show 5 more
  • StackDay Pro Monthly$4.991 Month
  • StackDay Pro Monthly Subscription3 Days trial$4.991 Month
  • Pro Annual Discount$19.991 Year
  • StackDay Pro Annual Subscription3 Days trial$24.991 Year
  • StackDay Pro Annual7 Days trial$49.991 Year
None

Supplement Inventory

No in-app purchases

Questions

Is StackDay free?
StackDay is free to download, with in-app purchases available.
Is Supplement Inventory free?
Supplement Inventory costs $0.99, with no in-app purchases.
Which has better reviews, StackDay or Supplement Inventory?
StackDay is rated higher. StackDay averages 5.0 out of 5 from 5 ratings, while Supplement Inventory averages 1.0 from 1 ratings.
Do StackDay or Supplement Inventory have ads?
StackDay shows ads; Supplement Inventory does not.

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