Comparison

Crobyrob vs Nine Under

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

Head to head
About

Crobyrob

Achieve your fitness goals with personalized workout plans tailored to your schedule, skill level, and objectives. Gain functional strength and body control with expert guidance and informational resources. Connect with a community through discussion groups for a comprehensive fitness service.

Highlights
  • Customized workout plans
  • Functional strength building
  • Personalized expert guidance
  • Informational resources
  • Community discussion groups
  • 24/7 personal access
Features
Read full description

Welcome to your new ultimate companion for achieving your fitness goals and unlocking your true potential. Crobyrob fitness app gives you specialized plans designed to help you move easier, build functional strength, feel better and so much more! Plans that are customized TO you. Built around your schedule, skill level and goals. (Most apps say they do this but they don’t. This one does) so you can truly know that this plan will be right for you! 24/7 access to me personally to help answer your questions and guide you every step of the way. Workouts that are going to unlock control over your own body and build real applicable, functional strength. Informational resources to help teach and guide you so you can learn how to apply and do it for yourself and much more. Interact with discussion groups within the app! This is more than just an app, rather a service designed and catered toward you! If you enjoy the CRob Training app, we’d really appreciate if you took a second to leave a nice review because it helps us improve and also helps get the word out. Thank you!!

About

Nine Under

Features
Read full description

Nine Under is a premium golf performance company that delivers science-driven training solutions for golfers seeking to elevate their game. We provide physical performance programming, virtual training platforms, and elite-level concierge coaching for serious and aspirational golfers nationwide. Our services include golf-specific fitness assessments, mobility and power development, swing performance optimization, and personalized coaching programs—both in-person and remote. Designed for transformation, Nine Under helps clients unlock greater distance, consistency, and longevity in the game. We serve recreational, competitive, and professional golfers who are committed to results.

Screenshots

Crobyrob4 screens
Nine Under4 screens

Verdict

The call

The clearest difference is update cadence: Crobyrob at every 3 months against Nine Under's every 13 months. Crobyrob also leads on iOS requirement (11.0 vs 15.0). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Crobyrob ships an update every 3 months, Nine Under every 13 months. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 8 level
Crobyrob versus Nine Under: the parameters behind the verdict, then further details
ParameterCrobyrobNine Under
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 months — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size54 MB40 MB
Age rating4+4+
DeveloperCory RobinsonJoseph Terrill

In-app purchases

None

Crobyrob

No in-app purchases

None

Nine Under

No in-app purchases

Questions

Is Crobyrob free?
Crobyrob is free to download, with no in-app purchases.
Is Nine Under free?
Nine Under is free to download, with no in-app purchases.
Do Crobyrob or Nine Under have ads?
Neither Crobyrob nor Nine Under shows ads.
Which is updated more often, Crobyrob or Nine Under?
Crobyrob ships an update every 3 months, and Nine Under every 13 months. Most recently, Crobyrob was updated on October 22, 2026 and Nine Under on October 19, 2026.

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