TrainerFlow vs Biostacks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TrainerFlow
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TrainerFlow is an all-in-one coaching platform built for personal trainers who want to deliver elite results through a proven system, structured accountability, and intelligent automation. It combines training programming, nutrition tracking, lifestyle monitoring, and performance analytics into one streamlined app, allowing coaches to manage clients professionally without relying on spreadsheets, multiple apps, or manual reporting. TrainerFlow is designed around one core principle: the best results come from clear targets, consistent tracking, and weekly feedback loops. The platform helps both trainer and client stay accountable by tracking the key variables that drive real transformation such as training volume, strength progression, cardio compliance, calorie and macro adherence, body composition trends, steps, sleep, hydration, stress, and recovery. With TrainerFlow, trainers can create structured training programs using periodised planning across micro, meso and macro cycles. Coaches can assign key indicator lifts (A1, A2, B1, B2) to measure progression, while the system automatically tracks performance trends, volume per muscle group, and estimated strength improvements over time. This allows trainers to coach with precision and make evidence-based decisions rather than relying on guesswork. TrainerFlow also includes powerful nutrition tools that track calories, macros, and key micronutrients, while highlighting missed logging days and recurring patterns that may be limiting progress. Trainers can quickly identify the biggest bottleneck in a client’s progress and intervene early, improving consistency and results. Lifestyle tracking is built directly into the platform, allowing trainers to set targets for steps, sleep, water intake, and recovery habits. TrainerFlow automatically compares targets vs actual performance and flags low adherence, making weekly check-ins more structured and effective. One of TrainerFlow’s standout features is automated report generation. Trainers can instantly create professional weekly, biweekly, monthly, quarterly, or yearly performance reports. These reports include before-and-after comparisons, progress summaries, target achievement tracking, and AI-generated insights that highlight what is working, what needs improvement, and what the highest priority focus should be for the next phase. Trainers can also add personalised feedback before sending the report to clients, ensuring coaching remains human and relationship-driven. TrainerFlow is built to help trainers save time, deliver higher quality coaching, improve client retention, and scale their business while maintaining a premium service. It is not just a tracking app, it is a complete coaching system designed to raise the standard of the fitness industry.
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.
Screenshots
Verdict
The clearest difference is in-app purchases: TrainerFlow at none against Biostacks's 2. On price, update cadence, 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
Both are free to download. Biostacks sells 2 in-app purchases, starting at $3.99 per month. TrainerFlow asks for nothing beyond the download.
TrainerFlow ships an update every 11 days, Biostacks every 10 days. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.
| Parameter | TrainerFlow | Biostacks |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 days | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 49 MB | 63 MB |
| Age rating | 4+ | 17+ |
| Developer | TrainerFlow LTD | Hmujo LLC |
In-app purchases
TrainerFlow
No in-app purchases
Biostacks
- Biostacks Pro - Monthly7 Days trial$3.991 Month
- Biostacks Pro - Annual14 Days trial$24.991 Year









