Comparison

Stark Bag vs StretchPrep

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

Head to head
About

Stark Bag

This app offers a virtual training experience with HD exercise videos and customizable workout plans. It supports various training styles like Tabata and HIIT, tracks progress, and integrates with Apple Health to log burned calories and completed workouts.

Highlights
  • HD exercise videos
  • Customizable workout plans
  • Tabata, HIIT, and Circuit training timers
  • Progress tracking and scoring
  • Targeted muscle group exercises
  • Apple Health integration
Features
Read full description

Optimize your results with Virtual Trainer Bag! - Be inspired by 27 exercises presented in sharp HD video. - Create your own personal workout. - Get a full body workout with exercises in all ranges of difficulty - While working out, follow the step by step workout-feature which take you through the workout using timers and your chosen specifics. - The timers support different workout types including Tabata, HIIT and Circuit training. - Challenge yourself, get rewards and keep track of your score. - Find exercises targeting specific muscle groups. Integration with Apple Health: Save burned calories and performed workouts. The Bag, is a crescent-shaped exercise equipment used in strength training, plyometric weight training, cardiovascular training, and general physical fitness. Exercises are performed by the professional instructor, Martin Söderblom.

About

StretchPrep

Features
Read full description

Your body, your routine. StretchPrep is a stretching routine builder: compose exactly the session you need — zones, holds, order — and follow it with the guided player. BUILD YOUR ROUTINE • Pick from 151 illustrated stretches, organized by body zone: neck, shoulders, back, lower back, hips, glutes, hamstrings, quads, calves and more • Set each block your way: timed hold (30 s, 45 s…) or breath cycles • Left/right sides, custom block names, from warm-up to wind-down • Save routines as templates, organize with folders and tags, mark favorites FOLLOW THE GUIDED PLAYER • Big posture illustration, countdown, next stretch always announced • Left/right reminders and a soft gong at the end of each block — no need to watch the screen • You stretch, it guides • Voice announcements: a voice says the next stretch, and can count down 3, 2, 1 • Apple Health (optional): each session is saved as a workout in the Health app START IN SECONDS • 15 ready-made routines: morning wake-up, desk break, runner's recovery, hips & lower back… • Or start from your zones, goal and time, then make it yours SHARE YOUR ROUTINES • Send any routine with a short link: to a friend, a running partner, a client. • The person who opens it adds it to their app in one tap — or sees it on a web page. • Manage your links in Settings: copy them again or delete them at any time. Only the routines you share leave your device. MADE FOR PRACTITIONERS AND PROS Physios, coaches and teachers prepare sequences for their clients with StretchPrep — and export any routine as a clean PDF. PRIVATE BY DESIGN No account, no tracking. Your routines stay on your device. STRETCHPREP PRO The free version lets you build and play your first routines. Pro unlocks unlimited routines, the full stretch library, audio preview and the gong — monthly or yearly subscription. Terms of Use: https://stretchprep.rocketcode.app/terms/ Privacy Policy: https://stretchprep.rocketcode.app/privacy/

Screenshots

Stark Bag4 screens
StretchPrep4 screens

Verdict

The call

The clearest difference is price: StretchPrep at Free against Stark Bag's $4.99. StretchPrep also leads on update cadence (every 4 days vs every 17 months). Stark Bag's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On ads 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

StretchPrep is free to download; Stark Bag costs $4.99 up front. StretchPrep sells 2 in-app purchases, starting at $5.99 per month. Stark Bag asks for nothing beyond the download.

UpkeepUpdate frequency

Stark Bag ships an update every 17 months, StretchPrep every 4 days. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Stark Bag versus StretchPrep: the parameters behind the verdict, then further details
ParameterStark BagStretchPrep
Price$4.99Free — better
Rating4.8 (50 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings50 — better—
Update frequencyEvery 17 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size57 MB33 MB
Age rating4+4+
DeveloperPostra ABAntoine Conan

In-app purchases

None

Stark Bag

No in-app purchases

2 purchases

StretchPrep

Subscriptions2
  • Pro Monthly$5.991 Month
  • Pro Yearly3 Days trial$29.991 Year

Questions

Is Stark Bag free?
Stark Bag costs $4.99, with no in-app purchases.
Is StretchPrep free?
StretchPrep is free to download, with in-app purchases available.
Do Stark Bag or StretchPrep have ads?
Neither Stark Bag nor StretchPrep shows ads.
Which is updated more often, Stark Bag or StretchPrep?
Stark Bag ships an update every 17 months, and StretchPrep every 4 days. Most recently, Stark Bag was updated on October 24, 2026 and StretchPrep on October 24, 2026.

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