Comparison

Boost vs StackDay

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

Head to head
About

Boost

Easily log your daily supplements and nutrition with gentle reminders and Apple Health sync. This app offers a clean, clutter-free interface for informed users who value privacy and simplicity in tracking their intake.

Highlights
  • Single-tap supplement check-off
  • Log missed intakes from past days
  • Apple Health sync
  • Gentle reminders
  • Planned daily intake overview
  • Clean, clutter-free design
Read full description

Boost is a lightweight supplement and nutrition tracker built for people who already know what they take, and just want a clean way to track it. No pushy recommendations, no marketplace, no complicated dashboards. Just simple logging, Apple Health sync, and smart reminders that help your routine stick. What you get: • Check off supplements with a single tap, from notifications, widgets, or Apple Watch. • Quickly log missed intakes from past days. • Apple Health sync for your intakes • Gentle reminders at your chosen times. • See your planned daily intake across all supplements and nutritions. • Clean design, zero clutter • Available in English, German, Spanish, French, and Italian Privacy, by design: • No selling of your data. • No third‑party ads or embedded supplement shop. • No fishy AI advices. • No pushy upsells or “personalized” recommendations. Who it’s for: • Informed users who want a reliable, lightweight tracker. • People who value privacy and simplicity over noise and “growth hacks.” Disclaimer: Boost does not provide medical advice. Always consult a qualified professional for personal guidance. Apples standard Terms of Use apply: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://justasimple.app/privacy

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

Screenshots

Boost4 screens
StackDay4 screens

Verdict

The call

The clearest difference is ads: Boost at none against StackDay's shown. StackDay's advantage is update cadence (every 3 days vs every 2 weeks). On price, review sentiment, in-app purchases and monetization model 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. Boost sells 4 in-app purchases, starting at $0.99 per month and StackDay sells 8 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Boost ships an update every 2 weeks, StackDay every 3 days. Both last shipped on September 28, 2026.

Scorecard2 real differences · 8 level
Boost versus StackDay: the parameters behind the verdict, then further details
ParameterBoostStackDay
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 2 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone
Requires iOS18.017.0 — better
Further details — not scored
Size5 MB20 MB
Age rating4+12+
DeveloperRene FischerFog Hill, LLC

Customer experience

Boost

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

StackDay

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

In-app purchases

4 purchases

Boost

Subscriptions1
  • Monthly Support$0.991 Month
One-time3
  • 1 Cup of Coffee (Support)$1.99
  • 1 Sandwich (Support)$4.99
  • 1 Lunch (Support)$11.99
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

Questions

Is Boost free?
Boost is free to download, with in-app purchases available.
Is StackDay free?
StackDay is free to download, with in-app purchases available.
Do Boost or StackDay have ads?
StackDay shows ads; Boost does not.
Which is updated more often, Boost or StackDay?
Boost ships an update every 2 weeks, and StackDay every 3 days. Most recently, Boost was updated on September 28, 2026 and StackDay on September 28, 2026.

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