Fiber Coach vs Engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fiber Coach
This app creates personalized workout plans for strength training, muscle building, and weight loss. It adapts to your goals, fitness level, and available equipment, offering smart weight recommendations and real-time adjustments for effective progress.
- Personalized workout plans
- Structured training programs
- Smart progression and tracking
- Adaptive training
- Gym and home workouts
- Extensive exercise library
- Workout stats and progress charts
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Your Personal Trainer for Strength, Muscle & Fitness Fiber is the ultimate workout planner and fitness coach that builds personalized workout plans for strength training, muscle building, weight loss, and overall fitness. Whether you train at the gym or at home, Fiber adapts your program to your goals, fitness level, schedule, and available equipment. Unlike generic apps, Fiber uses the science of progressive overload and smart weight recommendations to make every session effective. With adaptive training that updates after every set, you’ll always know the right weight, sets, and reps to keep improving consistently. WHAT MAKES FIBER UNIQUE • Personalized Workout Plans: Take a quick quiz and get a custom workout routine designed around your goals, fitness experience, training frequency, and available equipment. • Structured Training Programs: Programs for strength, hypertrophy, weight loss, and overall fitness, organized into blocks and phases for long-term results. • Smart Progression & Tracking: Fiber adjusts every workout in real time, updating weights and reps so you can keep building muscle and strength. • Fiber Score & Ranks: A unique system to measure progress, balance muscle groups, and stay motivated as you level up from Beginner to Elite. • Gym Workouts & Home Workouts: Effective sessions whether you have full gym equipment, a small setup, or just bodyweight. • Extensive Exercise Library: 140+ exercises with instructions, images, and alternatives to train every muscle group with confidence. • Workout Stats & Progress Charts: Track streaks, training volume, personal records, time spent, and weekly progress compared to your goals. PROGRAMS FOR EVERY GOAL • Strength Training Plans: Lift heavier, improve performance, and reach new PRs. • Hypertrophy Programs: Effective muscle building with structured volume and proven rep ranges. • Weight Loss Workouts: Burn fat, stay consistent, and preserve lean muscle. • Overall Fitness Programs: Balanced routines to feel stronger, healthier, and more athletic. FOR ALL LEVELS Fiber is built for every fitness level — from first timers and beginners to intermediate and advanced lifters. • Beginners: Learn safely with guided exercises, light starting weights, and gradual progression so you build confidence and consistency. • Intermediate users: Go beyond the basics with structured strength training and hypertrophy programs designed for steady muscle growth and new personal records. • Advanced lifters: Keep progressing with progressive overload, adaptive weight recommendations, and detailed tracking that helps you avoid plateaus and reach elite performance. No matter your level, Fiber adapts your workout plan so you can train effectively at the gym or at home and keep improving week after week. WHY USERS CHOOSE FIBER • A personal trainer app that guides every workout. • Long-term plans with measurable results. • Adaptive training that evolves with your performance. • Flexibility to train anywhere: home or gym workouts. • Motivation through the Fiber Score ranking system. • Confidence with detailed guidance and progress tracking. Fiber is more than a workout tracker — it’s your strength training coach, helping you stay consistent, motivated, and progressing every week. FIBER PRO Unlock your full potential with Fiber Pro. Flexible options: $4.99/week $12.99/month, $29.99/quarter, $59.99/year with a 3-day free trial and $34,99 for a discounted year! Privacy Policy: https://withfiber.com/privacy-policy/ Terms of Use: https://withfiber.com/terms-and-conditions/ Support: hello@withfiber.com
Engine
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Train Smarter. Run Stronger. Engine is a running companion built to help you boost your VO₂ max and unlock real endurance gains — without guesswork. Through personalized training plans and guided runs, Engine gives you the right workout at the right time, so every session actually moves your fitness forward. Designed for runners who want measurable progress, not random mileage, Engine turns every run into a step toward higher performance and stronger confidence. Features You’ll Love: - VO₂ Max Running Plans: Get personalized running plans designed specifically to improve your VO₂ max, endurance, and efficiency. - Guided Run Player: Hit start and let Engine guide your session — pace cues, structure, and automatic tracking included. - Clear Performance Insights: Visualize your VO₂ max, endurance, and consistency with clean stats and easy-to-read trends. - Train With Confidence: Know why you’re running each workout — and how it’s pushing your fitness higher. Turn Every Run Into Progress. Each workout has a purpose. No junk miles, no overthinking. Download Engine and watch your fitness rise. Run focused. Build power. Go further. A subscription is required to access the full app experience and features. Terms of Use: https://legal.rocapine.com/terms Privacy policy: https://legal.rocapine.com/privacy
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Verdict
Fiber Coach and Engine are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Fiber Coach sells 5 in-app purchases, starting at $4.99 per 7 days and Engine sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Fiber Coach ships an update weekly, Engine every 10 days. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.
| Parameter | Fiber Coach | Engine |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Every 10 days |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 74 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Grim Works Sociedad Limitada | Les Nants |
In-app purchases
Fiber Coach
- Fiber Premium Weekly$4.997 Days
- Fiber Premium Monthly$12.991 Month
- Fiber Premium Quarterly$29.993 Months
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- Fiber Premium Discount$34.991 Year
- Fiber Premium Yearly3 Days trial$59.991 Year
Engine
- Monthly Plan$9.991 Month
- Yearly Plan7 Days trial$39.991 Year









