Biostacks vs Stack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Biostacks
Easily manage your supplement intake with barcode scanning, AI assistance, and detailed insights. Track routines, monitor nutrient coverage, and analyze your stack's effectiveness and cost. Prioritizes user privacy with offline functionality and optional iCloud sync.
- Barcode scanning for supplement library
- AI-powered supplement routine analysis
- Customizable daily and cycle schedules
- StackScore for routine quality
- Potential interaction warnings
- RDA coverage and nutrient overlap analysis
- Mood, energy, and sleep trend tracking
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Biostacks helps you track, understand, and improve your supplement routine while keeping your data private. Build your supplement library by: • Scanning barcodes with your camera • Searching NIH DSLD and Open Food Facts data (well-known brands and popular supplements available offline) • Entering supplements, doses, and nutrients manually • Asking the built-in Apple Intelligence assistant (iPhone 15 Pro and newer) • Asking your own AI assistant with a ready-made copy-and-paste prompt Create routines and schedules that match how you take things: • Daily, specific weekdays, or on/off cycles (like 5 days on, 2 off) • Multiple times of day, from a morning multivitamin to an evening magnesium • Peptide support: vial size, reconstitution volume, and a draw-volume calculator Then get insights into your stack: • StackScore, a 0 to 100 quality score for your whole routine • Potential interactions based on public research, each with a source link • Warnings when a nutrient total goes over its safe upper limit • RDA coverage across your vitamins and minerals • Nutrient overlaps between products • Brand quality and trust signals • Adherence history and score trends over 30, 90, or 365 days, with CSV export • Monthly cost per supplement and per stack • Running-low refill alerts Log doses with one tap, mark a whole stack taken at once, and long-press to skip a dose without breaking your streak. Reminders keep you on schedule, and smart tuning suggests a better reminder time when you consistently log late. Progress rings and streaks show your consistency day by day. You can also log a dose by asking Siri. Your day, organized: • Doses grouped into taken, due, and upcoming • A calendar of every past day, with mood dots from your check-ins • Search and filter once your stack grows • Notes on stacks and on individual supplements • Reorder stacks and items to match how you take them • Dark, light, and system themes Check in daily on your mood, energy, sleep, and focus. View your trends, run on/off experiments, and see whether a supplement moves the numbers. Correlations only appear once there is enough data behind them; Biostacks will not show you a pattern it cannot stand behind. Ask questions in the on-device AI chat: review your routine, explain an ingredient, or change your stack by describing what you want. Every suggested change appears as a review you accept or reject, with undo. Prefer your personal assistant? Copy the prompt, paste the answer back, and review the changes the same way. Privacy first: • Works fully offline • No account and no sign-up • Your health data stays on your device • Optional backup and sync to your own iCloud • Snapshots and version history, so you can roll back any change • Export everything anytime as JSON or PDF, or share a stack as plain text Everyday tracking covers dose logging, streaks, reminders, check-ins with rating trends, the library and barcode scanner, export, import, and backups. Biostacks Pro, an annual subscription with a 7-day free trial, adds StackScore insights, check-in correlations, historical trends, cost tracking, smart reminder tuning, and cloud sync. Whether you take a daily vitamin D and omega-3 or manage a full stack of supplements, nootropics, and peptides, Biostacks gives you one private place to log your intake, stay consistent, and understand how your routine fits together.
Stack
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Stack keeps the supplements you already take organized — build your stack, get one calm reminder per moment, and log everything in a single tap. BUILD YOUR STACK Add the supplements you take, with your own doses and your own times. Pick from a small library of common gym supplements or add anything custom. Every library entry is general information with a cited public source. ONE REMINDER PER MOMENT Items due at the same time arrive as one notification, not five. Quiet hours are respected, and one gentle re-prompt is the maximum — no nagging. LOG IN ONE TAP Mark a whole time slot taken with a single tap. Skipping is fine too — history stays neutral, with no streaks and no guilt. TIMING NOTES, NOT ALARMS When your own schedule puts two items together that are commonly taken apart, Stack shows a quiet, dismissible note. Information, never alerts. STACK PRO Free keeps full tracking for up to 5 items, with reminders. Pro unlocks unlimited items, multiple stacks (cut / bulk), training-day schedules, and history export. Stack is an organizer. It shows general information from cited public sources — it does not give medical advice, recommend supplements, or suggest doses. Talk to a healthcare professional about what's right for you. SUBSCRIPTION DETAILS Stack Pro Monthly — 1 month, $2.99 (USD) Stack Pro Yearly — 1 year, $19.99 (USD) Stack Pro Lifetime — one-time purchase, $49.99 (USD) Prices are in USD and may vary by storefront. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the current period. Manage or cancel subscriptions in your Apple Account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://akselcb-sketch.github.io/stack-legal/privacy.html
Screenshots
Verdict
The clearest difference is iOS requirement: Biostacks at 15.1 against Stack's 17.0. On price, ads, in-app purchases 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
Both are free to download. Biostacks sells 2 in-app purchases, starting at $3.99 per month and Stack sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Biostacks | Stack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 63 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Hmujo LLC | HELGE JOHANNESSEN BJORLAND |
In-app purchases
Biostacks
- Biostacks Pro - Monthly7 Days trial$3.991 Month
- Biostacks Pro - Annual14 Days trial$24.991 Year
Stack
- Stack Pro Monthly$2.991 Month
- Stack Pro Yearly$19.991 Year
- Stack Pro Lifetime$49.99









