Comparison

Rello vs Training Stack

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

Head to head
About

Rello

Track your sleep, vitals, and activity to understand how they impact your well-being. Identify personal trends and build healthier habits for a longer, more vibrant life. All your health data remains private and on your device.

Highlights
  • Sleep tracking and analysis
  • Vitals monitoring
  • Activity and workout tracking
  • Personalized trend identification
  • On-device data privacy
  • Goal achievement monitoring
Features
Read full description

Rello is an app that makes it easier to track your sleep, vitals, and activity data for use with your Apple Watch: • Discover how your sleep and activity affect your vitals and how you feel each day. • Learn what's normal for you and when your body needs rest to recover. • See how much you move, work out, and get outside to reach your goals • Recognize trends and patterns to identify what's working for you. • Build sustainable practices that lead to a longer and healthier life. Absolute Privacy: • Health data stays on device and is never stored or shared online Coming Soon: • Additional sleep metrics • More detailed status indicators • Long term trends and statistics • Detail and insights into workouts Better Together • Your feedback will shape Rello’s future. Reach out anytime to sam@rello.app to help make Rello better for you and the entire Rello community. Free Trial • Rello offers a 7-day trial for new users Rello is not for medical use or intended to diagnose, treat, cure, monitor, or prevent medical conditions or illnesses. Rello is only designed for general fitness and wellness purposes. Terms of Service: https://www.rello.app/terms Privacy Policy: https://www.rello.app/privacy

About

Training Stack

This app consolidates running, strength training, and short exercise bursts into a single platform. It allows users to import training plans, track progress with detailed analytics, and integrate with health data. Personalize your fitness journey with customizable plans and shareable progress reports.

Highlights
  • Import running and strength training plans
  • Track running, strength, and exercise snacks
  • Apple Health integration for automatic syncing
  • Detailed running and strength analytics
  • Customizable strength training with 400+ exercises
  • Widgets and Live Activities for quick access
  • Weather integration for optimized runs
Features
Read full description

Training Stack is the all-in-one fitness app for runners who also lift. Track your running, strength training, and quick exercise snacks—all in one place. RUNNING & TRAINING PLANS - Create multi-week running plans with 11 workout types including Easy, Tempo, Intervals, Long Run, and more - Import plans from Markdown, CSV, ChatGPT, or Claude - Track plan progress with skip/unskip options and recovery scheduling - Add run notes capturing intent, effort level, and conditions APPLE HEALTH INTEGRATION - Sync running workouts automatically from Apple Health - Track distance, pace, calories, heart rate, elevation, and cadence - Link your scheduled workouts to completed runs - Capture weather conditions at workout time RUNNING ANALYTICS - Weekly, monthly, and all-time mileage tracking - Year-over-year comparisons to see your progress - Fastest paces for mile, 5K, and 10K distances - Heart rate analysis including zones, HRV, and VO2 Max - Training load ratios and running streaks STRENGTH TRAINING - Build multi-week strength plans with flexible splits (Full Body, Upper/Lower, Push/Pull/Legs) - 400+ built-in exercises organized by muscle group and equipment - Track sets, reps, weight, RPE, and failure - Support for supersets, circuits, drop sets, and time-based exercises - Personal records and 1RM estimation - Rest timer with haptic feedback EXERCISE SNACKS - Schedule 1-5 minute exercise bursts throughout your day - Create custom sessions with multiple exercises - Track streaks and build consistent movement habits - Quick logging from notifications - 10 color themes to personalize your snacks WIDGETS & LIVE ACTIVITIES - Home screen widgets showing weekly mileage and charts - Lock screen widgets for quick stats - Live Activities during strength workouts and exercise snacks - Dynamic Island support WEATHER INTEGRATION - Real-time conditions and forecasts - Running conditions score (0-100) based on temperature, wind, and precipitation - Plan your runs around the best weather windows SHARE YOUR PROGRESS - Beautiful shareable graphics for runs and weekly summaries - Multiple themes optimized for Instagram, Twitter, and more - Customize what stats to include - Export your health profile for AI coaching integration HYBRID TRAINING - Link running and strength plans together - See your combined daily schedule - Smart conflict resolution for busy training days Built for runners who want to get stronger without juggling multiple apps. Training Stack brings your entire fitness routine into one streamlined experience. https://www.apple.com/legal/internet-services/itunes/dev/stddevelopereula/

Screenshots

Rello4 screens
Training Stack4 screens

Verdict

The call

The clearest difference is update cadence: Rello at monthly against Training Stack's every 3 months. Rello also leads on iOS requirement (17.6 vs 26.2). On price, rating, review sentiment and ratings volume 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. Rello sells 2 in-app purchases, starting at $2.99 per month and Training Stack sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Rello against 5.0 for Training Stack. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Rello ships an update monthly, Training Stack every 3 months. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
Rello versus Training Stack: the parameters behind the verdict, then further details
ParameterRelloTraining Stack
PriceFreeFree
Rating5.0 (3 ratings)5.0 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings36 — better
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS17.6 — better26.2
Further details — not scored
Size1 MB26 MB
Age rating4+4+
DeveloperSam MalapasRaven Howard

Customer experience

Rello

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Training Stack

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Rello

Subscriptions2
  • Subscription (Monthly)7 Days trial$2.991 Month
  • Subscription (Yearly)7 Days trial$24.991 Year
3 purchases

Training Stack

Subscriptions2
  • Pro Stacker - Monthly$4.991 Month
  • Pro Stacker - Annual7 Days trial$19.991 Year
One-time1
  • Pro Stacker - Believer$99.99

Questions

Is Rello free?
Rello is free to download, with in-app purchases available.
Is Training Stack free?
Training Stack is free to download, with in-app purchases available.
Which has better reviews, Rello or Training Stack?
Rello and Training Stack are both rated 5.0 out of 5 on the App Store, from 3 and 6 ratings respectively.
Do Rello or Training Stack have ads?
Neither Rello nor Training Stack shows ads.
Which is updated more often, Rello or Training Stack?
Rello ships an update monthly, and Training Stack every 3 months. Most recently, Rello was updated on October 24, 2026 and Training Stack on October 24, 2026.

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