Comparison

FuelStack vs Brim

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

Head to head
About

FuelStack

Features
Read full description

FuelStack helps you track your daily supplement intake and stay consistent with your routine. WHAT IT DOES Track which supplements you've taken each day with a simple checklist. Set up notification reminders so you don't forget doses. Get personalized recommendations based on your fitness goals. KEY FEATURES • Daily Checklist - Mark off supplements as you take them throughout the day • Goal-Based Recommendations - Answer a few questions about your training, get supplement suggestions that match • Custom Reminders - Set notifications for different times (morning, pre-workout, post-workout, etc.) • Research Information - Each supplement includes dosage info, benefits, and links to studies • Custom Supplements - Add items not in our library with your own dosage and timing • Offline Support - Track your intake even without internet connection • Weekly Stats - See your adherence percentage and daily streak HOW IT WORKS 1. Complete a quick setup - tell us your fitness goals 2. Add supplements to your daily routine from our library or create custom ones 3. Check them off each day as you take them 4. Set reminder notifications for times that work for your schedule 5. View your weekly tracking stats and streaks THE LIBRARY Includes common supplements with research-backed information: - Proteins (Whey, Casein, Plant-Based) - Performance (Creatine, Beta-Alanine, Caffeine) - Recovery (BCAAs, L-Glutamine, Omega-3) - Vitamins & Minerals (D3, B12, Magnesium, Zinc) - And more Each supplement entry includes typical dosage, timing recommendations, benefits, warnings, and links to research sources. WHO IT'S FOR Built for athletes, gym-goers, and anyone taking multiple supplements who wants to stay organized and consistent. REQUIREMENTS iOS 15.1 or later. Notifications require permission.

About

Brim

Features
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Creatine is not a painkiller. It does not work on the day you take it — it works by saturation. Your muscle stores fill up over weeks and drain again when you stop. Brim turns that into one number you can actually watch. YOUR SATURATION, NOT A STREAK The number rises on the days you dose and falls on the days you miss, by roughly one to two percent a day. It is not a counter that resets to zero to punish you. It is an estimate of where your muscle creatine actually stands, from a model fitted to the published research — which means a missed day costs you exactly what it costs you, no more. A PLAN BUILT FROM YOUR BODY • A daily dose calculated from your body weight, not a flat scoop line • Standard or loading, with the real trade-off between them spelled out • A projected curve to the day you reach full • Reminders timed to when you actually take it SEE WHAT A BREAK COSTS Progress draws your saturation over time, tells you what a fortnight off would do, and counts the days back to full. Miss a day and you will see it move. That is the entire point. EVIDENCE, GRADED The library answers what people actually ask. Is loading necessary. Does creatine damage your kidneys. Does it cause hair loss. Is it different for women. Is it worth it after fifty. Every article carries a grade — Established, Emerging, Early or Myth — so you can tell a settled question from an open one instead of guessing. QUIET BY DESIGN • A Home Screen widget with today's number • Apple Health reads your weight so the dose stays right as you change; nothing is written back • No account, no sign-up, no email • Your log lives on your iPhone Brim Pro unlocks the full history, the forecast, protocol switching and the complete library. Logging your dose is free, always — a tracker that locks the tracking is not a tracker. Brim Pro is an auto-renewing subscription, offered yearly (with a free trial) or weekly. The price for your region is shown in the app before you buy. Payment is charged to your Apple Account at confirmation of purchase, and the subscription renews automatically unless you turn it off at least 24 hours before the end of the current period. Manage or cancel in Settings › Apple Account › Subscriptions. Terms of Use: https://brim-legal.web.app/terms Privacy Policy: https://brim-legal.web.app/privacy

Screenshots

FuelStack4 screens
Brim4 screens

Verdict

The call

The clearest difference is in-app purchases: FuelStack at none against Brim's 3. FuelStack also leads on iOS requirement (15.1 vs 17.0). Brim's advantage is update cadence (daily vs every 10 months). On price, ads and device support there is nothing between them.

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

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

Both are free to download. Brim sells 3 in-app purchases, starting at $4.99 per 7 days. FuelStack asks for nothing beyond the download.

UpkeepUpdate frequency

FuelStack ships an update every 10 months, Brim daily. The most recent releases landed on September 7, 2026 and September 22, 2026 respectively.

Scorecard3 real differences Ā· 3 level
FuelStack versus Brim: the parameters behind the verdict, then further details
ParameterFuelStackBrim
PriceFreeFree
Update frequencyEvery 10 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size33 MB21 MB
Age rating12+12+
DeveloperYoann AbrielAnastassiya Shugaley

In-app purchases

None

FuelStack

No in-app purchases

3 purchases

Brim

Subscriptions3
  • Brim Pro (Weekly)3 Days trial$4.997 Days
  • Brim Pro (Yearly)3 Days trial$29.991 Year
  • Brim Pro (Welcome Offer)1 Year trial$29.991 Year

Questions

Is FuelStack free?
FuelStack is free to download, with no in-app purchases.
Is Brim free?
Brim is free to download, with in-app purchases available.
Do FuelStack or Brim have ads?
Neither FuelStack nor Brim shows ads.
Which is updated more often, FuelStack or Brim?
FuelStack ships an update every 10 months, and Brim daily. Most recently, FuelStack was updated on September 7, 2026 and Brim on September 22, 2026.

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