Comparison

Seed Controller vs Stack

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

Head to head
About

Seed Controller

This app helps users track their progress, stay motivated with daily insights, and build discipline through habit formation and achievements. It aims to enhance focus, energy, and drive.

Highlights
  • Track streak progress
  • Daily motivational insights
  • Science-backed benefits
  • Habit building tools
  • Achievement unlocking
  • Visualize growth
Features
Read full description

Seed Controller is your dedicated Retention App, designed to track your progress, strengthen your resolve, and celebrate your milestones. Track Your Streak: Log your journey with a simple, private, and secure counter. Stay Motivated: Receive daily insights, motivational quotes, and science-backed benefits to keep you focused on your goals. Build Powerful Habits: Unlock achievements and visualize your growth as you build unshakable discipline and vitality. Reclaim your focus, energy, and drive. Download Seed Controller and build a stronger you. A Seed Controller subscription is required to use and enjoy full access to features and content. If you choose a Seed Controller subscription, payment will be charged to your Apple ID account at confirmation of purchase. The subscription will automatically renew unless turned off in your Apple Account Settings at least 24 hours before the current period ends. From your Apple Account settings, you can manage your subscription and turn off auto-renew. Your Apple ID account will be charged when the purchase is confirmed. If you subscribe before your trial ends, the remaining free trial period will be forfeited when your purchase is confirmed. Privacy Policy: seedcontroller.app/PrivacyPolicy.html Terms of Use: seedcontroller.app/TermsAndConditions.html EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

Seed Controller4 screens
Stack4 screens

Verdict

The call

The clearest difference is review sentiment: Stack at 100% against Seed Controller's 50%. Stack also leads on in-app purchases (none vs 4). Seed Controller's advantage is iOS requirement (13.0 vs 26.2). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Seed Controller sells 4 in-app purchases, starting at $9.99 per month. Stack asks for nothing beyond the download.

UpkeepUpdate frequency

Seed Controller ships an update weekly, Stack every 10 days. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
Seed Controller versus Stack: the parameters behind the verdict, then further details
ParameterSeed ControllerStack
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings—2 — better
Update frequencyWeekly — betterEvery 10 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better26.2
Further details — not scored
Size57 MB22 MB
Age rating17+4+
DeveloperKai FrohnerLauterstar Technologies, Inc

Customer experience

Seed Controller

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Stack

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

In-app purchases

4 purchases

Seed Controller

Subscriptions4
  • Monthly Plan for Seed Controller$9.991 Month
  • yearlydiscount2$17.991 Year
  • yearlydiscount1$21.491 Year
Show 1 more
  • Yeary Plan for Seed Controller$39.991 Year
None

Stack

No in-app purchases

Questions

Is Seed Controller free?
Seed Controller is free to download, with in-app purchases available.
Is Stack free?
Stack is free to download, with no in-app purchases.
Do Seed Controller or Stack have ads?
Neither Seed Controller nor Stack shows ads.
Which is updated more often, Seed Controller or Stack?
Seed Controller ships an update weekly, and Stack every 10 days. Most recently, Seed Controller was updated on October 9, 2026 and Stack on October 2, 2026.

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