Comparison

Stretch Strong vs NBSTrainingSystems

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

Head to head
About

Stretch Strong

Access a vast library of over 400 stretching exercises with video demonstrations and expert-led weekly workouts. Find specific stretches for your sport or needs with powerful search and filtering tools. Track your progress with an in-app journal.

Highlights
  • 400+ stretching exercises with video demonstrations
  • Expert-led weekly flexibility workouts
  • Search, filter, and substitute functions
  • Novice and experienced training tracks
  • In-app training journal
  • Tutorial videos and FAQ resource library
Features
Read full description

Unlock Your Ultimate Flexibility with Stretch Strong! Over 400+ stretching exercises and growing! With search, filtering, and substitution functions, you'll be able to explore a world of flexibility training you can't find anywhere else online! With Jon Call (@jujimufu), a flexibility expert with over 20 years of experience competing in Martial Arts, Bodybuilding, and Strength Sports, you'll get new weekly flexibility workouts created by him (that he does himself!) that you can incorporate into your training. The weekly workouts are quick and effective, demanding only 1 hour per week of total work to see improvements for even the busiest or biggest athletes out there! There are two versions of the weekly workouts: a novice version and an experienced version that you can jump between. Most flexibility apps out there are AI abominations with no link to reality or real people. Stretch Strong demystifies flexibility training and has busy people and actual athletes in mind. We make flexibility convenient but also specific. Just search the database for stretches related to your sport or need and try them out! Stretch Strong has features that help make it incredibly easy for you to continue stretching with a multitude of customizations. With the Stretch Strong app, you can: – Explore explanations and in-app video demonstrations for every movement in our exercise library of 400+ movements, many of which you've never seen anywhere else! – Navigate the exercise library with filter, substitute, and search functions to find the stretch you need when you need it quickly! – Stay updated with weekly videos and notes with the exact flexibility training focus of any given week, as well as the broader context of where we are in a flexibility training cycle. – Learn with our extensive Tutorial Video and FAQ resource library to help you understand flexibility training principles, techniques, and considerations that can affect your stretching. – Get a new week of flexibility programming every Sunday with two training tracks: Novice and Experienced. – Use an in-app training journal with references to recent performance to track your results. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

NBSTrainingSystems

Features
Read full description

NBS Coaching is the private client portal for live, individualized fitness coaching between one client and one human NBS coach. Access to paid coaching features requires the separate purchase of one of the three auto-renewable subscriptions described below through Apple's In-App Purchase. Each subscription includes scheduled one-to-one coaching, training tools, workout logging, progress tracking, check-ins, education, and individualized guidance according to the selected service level. NBS Managed includes an NBS-managed training program, weekly coaching review, and direct coaching messages. Builder Weekly includes the full workout and program builder, weekly coaching review, and direct coaching messages. Builder Monthly includes the full workout and program builder, monthly coaching review, and progress, check-in, and calendar tools. Clients can follow their program, log workouts, share check-ins and progress, and review personalized feedback. Existing NBS website customers may sign in and continue using access already associated with their NBS account. App Store customers can restore eligible purchases from the Subscription screen in Settings. Payment is charged to the customer's Apple ID at confirmation. Subscriptions renew automatically unless cancelled in App Store settings at least 24 hours before the end of the current period. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Stretch Strong4 screens
NBSTrainingSystems3 screens

Verdict

The call

The clearest difference is update cadence: NBSTrainingSystems at every 3 days against Stretch Strong's every 3 months. On price, ads, in-app purchases 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. Stretch Strong sells 3 in-app purchases, starting at $8.99 per month and NBSTrainingSystems sells 3 in-app purchases, starting at $49.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stretch Strong ships an update every 3 months, NBSTrainingSystems every 3 days. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 9 level
Stretch Strong versus NBSTrainingSystems: the parameters behind the verdict, then further details
ParameterStretch StrongNBSTrainingSystems
PriceFreeFree
Rating4.4 (62 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings62 — better—
Update frequencyEvery 3 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.115.1
Further details — not scored
Size119 MB80 MB
Age rating17+12+
DeveloperTrainmakr LLCJoseph Patch

In-app purchases

3 purchases

Stretch Strong

Subscriptions3
  • Monthly7 Days trial$8.991 Month
  • Quarterly7 Days trial$25.003 Months
  • Yearly7 Days trial$89.991 Year
3 purchases

NBSTrainingSystems

Subscriptions3
  • Builder + Monthly Coaching$49.991 Month
  • Builder + Weekly Coaching$99.991 Month
  • NBS-Managed Coaching$199.991 Month

Questions

Is Stretch Strong free?
Stretch Strong is free to download, with in-app purchases available.
Is NBSTrainingSystems free?
NBSTrainingSystems is free to download, with in-app purchases available.
Do Stretch Strong or NBSTrainingSystems have ads?
Neither Stretch Strong nor NBSTrainingSystems shows ads.
Which is updated more often, Stretch Strong or NBSTrainingSystems?
Stretch Strong ships an update every 3 months, and NBSTrainingSystems every 3 days. Most recently, Stretch Strong was updated on October 14, 2026 and NBSTrainingSystems on October 7, 2026.

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