Comparison

SHRDRZ vs Stack

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

Head to head
About

SHRDRZ

Track your mountain activities like biking, skiing, and hiking with detailed stats, graphs, and 3D maps. Build and share community trails, and sync your health data with Apple Health.

Highlights
  • Activity tracking (skiing, biking, hiking, running)
  • Detailed stats and graphs
  • 3D maps of routes
  • Community trail system
  • Apple Health integration
  • Watch app support
Features
Read full description

SHRDRZ [shred-erz]: a person who shreds mountains by board, skis, bike, or on foot. For biking, running, and endurance sports, SHRDRZ gives you the stats, graphs, and maps and 3D Maps breaking down the grueling climbs and the sweet descents and integrates with the Apple Health App. When you're skiing, snowboarding, or downhill mountain biking, just start SHRDRZ and your runs will be tracked while you're out shredding the mountain. At the end of the day, use SHRDRZ to check the stats, graphs, and maps to see how steep the runs on the mountain you shredded. SHRDRZ is a community trail system. When you record your biking, hiking, running, and backcountry skiing excursions, you can then save these activities into new trails and build on a community trail information system. Also, if you want to save your own trail network you can. SHRDRZ takes your mountain biking, running, skiing, snowboarding, downhill mountain biking, hiking, and cycling to your paired watch on your wrist. SHRDRZ works with HealthKit giving you access to heart rate and other health data. Terms of Use: https://shrrddrz.com/terms-of-use

About

Stack

This app helps users track their weightlifting progress with a focus on ease of use and data privacy. It allows for detailed logging of sets, exercise planning, and visual progress tracking without ads or intrusive notifications.

Highlights
  • Distraction-free lifting log
  • Local-first data storage with optional iCloud sync
  • Customizable splits and routines
  • Extensive exercise library with muscle mapping
  • Detailed per-set logging
  • Plate calculator for real-world racks
  • Progress visualization and trend analysis
Features
Read full description

Less tapping. More time lifting. See how far you have come. Stack is a workout log for strength training. Walk in with a routine ready, keep your last session's numbers close and see your progress over time. Start free, with no account required. With Stack Pro, get a target for your next set, skip the plate math and repeat a set from your iPhone Lock Screen without reopening the app. KEEP YOUR WORKOUT MOVING Log weight and reps with controls made for the time between sets. Your previous session's numbers are prefilled, so you can pick up where you left off. Build routines, add your own exercises and train in pounds or kilograms. SEE WHAT YOUR WORK IS ADDING UP TO Revisit your workout history, follow strength trends and track personal records. Explore the muscle map to see which muscles your logged sets worked. Your workout log, history, basic trends and muscle map are free. GIVE YOUR NEXT SESSION A DIRECTION WITH PRO - Know what to lift next. Smart Targets suggest weight and reps based on your logged sets. - Keep logging from your Lock Screen or Dynamic Island. Repeat your previous set and add rest time on iPhone. - Load the bar without the math. See the plates to put on each side for your chosen weight. - Turn a weekly gap into a plan. Compare planned sets with your muscle targets, preview a routine change and save it when it fits your week. - See progress beyond the numbers. Compare progress photos and work toward your next max attempt with guided one-rep max testing. Pro also includes Gym Mode, suggested exercise replacements, extra themes and custom appearance controls. YOUR TRAINING, WITH YOU Log workouts offline. Export and import your training data, and choose optional iCloud sync. No account is needed to start training. Start with your next workout. Keep a record you can build on. STACK PRO Optional monthly or yearly subscription, or a lifetime purchase. Subscriptions renew automatically until cancelled. Manage or cancel your subscription in your App Store account settings. Lifetime is a one-time purchase. Terms of Service: https://stack.lauterstar.com/terms.html

Screenshots

SHRDRZ4 screens
Stack4 screens

Verdict

The call

The clearest difference is in-app purchases: Stack at none against SHRDRZ's 1. SHRDRZ's advantage is iOS requirement (18.0 vs 26.2). On price, rating, ratings volume and update cadence 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. SHRDRZ sells 1 in-app purchase, starting at $0.99 per month. Stack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for SHRDRZ against 5.0 for Stack. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

SHRDRZ ships an update every 2 weeks, Stack every 10 days. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
SHRDRZ versus Stack: the parameters behind the verdict, then further details
ParameterSHRDRZStack
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 2 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.0 — better26.2
Further details — not scored
Size114 MB22 MB
Age rating4+4+
DeveloperMarshall CregerLauterstar Technologies, Inc

Customer experience

SHRDRZ

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Stack

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

SHRDRZ

Subscriptions1
  • SHRDDRRZ Monthly Access$0.991 Month
None

Stack

No in-app purchases

Questions

Is SHRDRZ free?
SHRDRZ is free to download, with in-app purchases available.
Is Stack free?
Stack is free to download, with no in-app purchases.
Which has better reviews, SHRDRZ or Stack?
SHRDRZ and Stack are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do SHRDRZ or Stack have ads?
Neither SHRDRZ nor Stack shows ads.
Which is updated more often, SHRDRZ or Stack?
SHRDRZ ships an update every 2 weeks, and Stack every 10 days. Most recently, SHRDRZ was updated on September 23, 2026 and Stack on October 2, 2026.

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