Comparison

ISOBEAST vs RankZero

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

Head to head
About

ISOBEAST

Features
Read full description

Stop logging dynamic repetitions for a static workout. Muscles respond to tension, and isometric bar training is the ultimate way to build raw, injury-resistant strength. But standard fitness trackers are built for dynamic gyms. They do not understand force-based holds, strap-slot heights, or the precise progressive overload rules required for true isometric gains. Enter ISOBEAST. ISOBEAST is a premium, high-contrast training log designed specifically for isometric bar (ISO-BAR) equipment. By tracking exact force, hold duration, and strap slot positions (1–36), ISOBEAST removes the guesswork and guides you through deterministic progression rules to ensure consistent, measurable strength increases. PRECISION ISOMETRIC LOGGING Log force, hold duration, and exact ISO-BAR hook slots (1–36) to record performance at specific muscle lengths. The speed-first UI lets you log a set in under three taps. DETERMINISTIC PROGRESSION ENGINE ISOBEAST automatically scores sets (Success, Neutral, Failure) and updates targets using transparent rules like double progression, time-target holds, and average-capacity tracking. BUILT-IN ISO-BAR / ISOCHAIN / ISOMAX PROGRAMS Load read-only training templates straight from the manual: • The Promethean (6-second holds with double progression) • 6x6 (fixed percentage of tested 1RM) • Military Power (max-effort singles with slot variation) • Iron Man (long holds for conditioning) • One-Rep Max Testing (averages peak force attempts) DEVELOPER-PREMIUM UX • Pre-filled target inputs based on previous session data. • Custom haptic logging alerts for clear tactile confirmations. • Automated rest timers with skip commands and background notifications. • Persistent Active Workout banner to resume or discard sessions safely. PR VAULT & TRENDS Track your all-time bests per slot/mode and watch your strength curve rise with interactive volume charts. SECURE SYNC & PRIVACY ISOBEAST securely stores your profile, routines, and workout logs in a private cloud database. All logins and tokens are encrypted and kept in the iOS secure keychain. We collect no tracking data and never sell your personal information. Unlock true tension-based strength. Track with ISOBEAST. Terms of Use: https://isobeast.app/terms/

About

RankZero

Build discipline through daily habits and track your progress with a unique character leveling system. Engage in guided skill sprints and compete with friends in weekly leagues. Offers a free tier with core features and a Pro subscription for advanced tools.

Highlights
  • Daily habit tracking
  • Streak building
  • Gamified character progression
  • Guided skill sprints
  • Friend accountability and leagues
  • Forgiveness mechanic for missed days
Features
Read full description

Most people drift. You are done drifting. RankZero is a discipline app for people who are done making excuses. Pick three non-negotiables, hold them every single day, and build a streak you refuse to break. Your future self is a character you level up one disciplined day at a time. No fluff. No streak-shaming gimmicks. Just the standard, held daily. THE DAILY LOOP - Choose three non-negotiables that actually matter (train, read, no feed before noon, cold shower, whatever your standard is) - Check them off, report back, and tick your streak - A built-in forgiveness mechanic means one missed day never wipes you out BUILD YOUR FUTURE SELF - Your character evolves as you level up, from a dormant form all the way through eleven forms of ascension - Earn XP every day you hold the line - Share your rank card when you hit a milestone GUIDED JOURNEYS - Escalating skill sprints that ramp a single discipline day by day (deep work, stillness, daily movement) - Hit the day's target to advance. Miss it and the day holds. No skipping. - Finish to earn a badge and a reward STAY ACCOUNTABLE - Add friends by handle or code and compare streaks - Climb a weekly league against other people holding the standard - You stay a pseudonym. Friends only ever see your streak and level, never your habits or reflections. NEVER LOSE YOUR PROGRESS - Sign in with Apple to back up your streak, level, and character to your account - Switch phones and pick up exactly where you left off - Hide My Email supported, so you can stay private RANKZERO PRO The daily loop and your squad are free forever. Pro unlocks the deep climb: - Your character, all the way through every evolution - The full AI coach, tuned to your reason for starting - Focus timer and the weekly gauntlet - Every guided journey - Level-up clips of your evolved form Pro is an auto-renewing subscription. A free trial is available. Price shown in-app; it renews until canceled, and you can cancel anytime in your Apple account settings. Comfort is a slow way to lose. Build the streak. Become the man. RankZero is a product of OriKone LLC. Privacy: https://rankzeroapp.com/privacy Terms: https://rankzeroapp.com/terms

Screenshots

ISOBEAST4 screens
RankZero4 screens

Verdict

The call

The clearest difference is in-app purchases: RankZero at none against ISOBEAST's 2. RankZero also leads on update cadence (every 3 days vs every 5 weeks). ISOBEAST's advantage is ads (none vs shown) and device support (3 vs 1). On price and iOS requirement 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. ISOBEAST sells 2 in-app purchases, starting at $4.99 per month. RankZero asks for nothing beyond the download.

UpkeepUpdate frequency

ISOBEAST ships an update every 5 weeks, RankZero every 3 days. The most recent releases landed on October 28, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 5 level
ISOBEAST versus RankZero: the parameters behind the verdict, then further details
ParameterISOBEASTRankZero
PriceFreeFree
Rating—4.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Free with in-app purchases
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size50 MB303 MB
Age rating4+12+
DeveloperAndrew IsabiryeOriKone LLC

In-app purchases

2 purchases

ISOBEAST

Subscriptions2
  • ISOBEAST Pro (Monthly)7 Days trial$4.991 Month
  • ISOBEAST Pro (Annual)7 Days trial$49.991 Year
None

RankZero

No in-app purchases

Questions

Is ISOBEAST free?
ISOBEAST is free to download, with in-app purchases available.
Is RankZero free?
RankZero is free to download, with no in-app purchases.
Do ISOBEAST or RankZero have ads?
RankZero shows ads; ISOBEAST does not.
Which is updated more often, ISOBEAST or RankZero?
ISOBEAST ships an update every 5 weeks, and RankZero every 3 days. Most recently, ISOBEAST was updated on October 28, 2026 and RankZero on October 16, 2026.

Other comparisons