Comparison

One Rep Max vs RXTime Pro

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

Head to head
About

One Rep Max

Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.

Highlights
  • Precise 1RM calculations with 7 scientific formulas
  • RPE integration for fine-tuned estimates
  • Custom exercise tracking for any lift
  • Visual progress graphs
  • Percentage charts for training
  • Goal setting and progress monitoring
Features
Read full description

Stronger Training, Smarter Progress One Rep Max helps you safely and accurately determine your maximum lift potential for bench press, deadlift, squat, and any other strength exercise - without risking injury. Key Features: • Precise Calculations - 7 scientific formulas for accurate strength predictions: Epley, Brzycki, Lombardi, Mayhew, McGlothin, O'Conner, Wathan • RPE Integration - Factor in Rate of Perceived Exertion to fine-tune your max estimates based on how difficult sets feel • Custom Exercise Tracking - Create and monitor any lift that matters to you • Visual Progress - Beautiful graphs show your strength journey over time • Percentage Charts - Quick reference guide for training percentages • Goal Setting - Set targets and track your path to reaching them Perfect for: • Powerlifters optimizing their training cycles • CrossFit athletes tracking multiple movement patterns • Olympic weightlifters monitoring progress • Strength enthusiasts at any level Advanced Features: • Choose between multiple calculation formulas for different lift types • Track unlimited exercises with custom notes • Rate of Perceived Exertion (RPE) - Fine-tune your 1RM estimates based on how difficult sets feel • Analyze detailed statistics including volume and frequency • Set and monitor progress toward specific strength goals The Science Behind The Numbers: Our app employs multiple validated formulas to estimate your one-rep maximum based on your performance with submaximal weights. This provides you with safe strength targets before attempting potentially risky maximal lifts. Safety Note: Heavy weightlifting should always be performed with proper technique and appropriate spotting. This app provides estimates based on scientific formulas, but individual performance may vary based on experience level and training history. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

RXTime Pro

Features
Read full description

6 DEPORTES · 25+ MODOS: • CrossFit: Tabata, EMOM, AMRAP, For Time, Chipper • Running: Intervals, Fartlek, Tempo, Piramides, Japanese Walking • Hyrox: Simulation 8x8, Estaciones, Run+Fuerza, Zone 2 • Boxing/MMA: Boxing, Muay Thai, MMA, Shadow Box • HIIT: Clasico, Circuit, SIT, Escalera • Calistenia: Grease Groove, Skill Work, Max Effort, Flow COACH DE VOZ MILITAR: • Cuenta regresiva 3-2-1 hablada • Frases de impacto en cada transicion • Coach Hombre (voz grave) o Coach Mujer (energetica) TEMAS VISUALES: • Dark Pro, Neon Gym, Military, Zen Flow, Ect SEGUIMIENTO: • Historial con notas personalizadas • Racha de dias consecutivos • Estadisticas acumuladas CALCULADORA DE PORCENTAJE • Calcula el porcentaje de peso para tu Wod • Boton de RM GESTION DE RM • Guarda y Gestiona tus RM • Conexion con la calculadora MAS FUNCIONALIDADES: • Modo Gym: pantalla gigante proyectable • Flash visual en cada transicion • WODs favoritos guardados • For Time libre o con Time Cap • 100% offline

Screenshots

One Rep Max4 screens
RXTime Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: RXTime Pro at none against One Rep Max's 3. RXTime Pro also leads on ads (none vs shown). One Rep Max's advantage is update cadence (every 6 days vs monthly). On price, device support 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. One Rep Max sells 3 in-app purchases, starting at $2.99 per month. RXTime Pro asks for nothing beyond the download.

UpkeepUpdate frequency

One Rep Max ships an update every 6 days, RXTime Pro monthly. The most recent releases landed on October 23, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
One Rep Max versus RXTime Pro: the parameters behind the verdict, then further details
ParameterOne Rep MaxRXTime Pro
PriceFreeFree
Rating4.4 (185 ratings) — better—
Positive reviews58.2% of reviews—
Number of ratings185 — better—
Update frequencyEvery 6 days — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size52 MB24 MB
Age rating4+4+
DeveloperCharles Vanderhoffjose leonardo paez salgado

Bugs and requests

One Rep Max

Reported bugs

13 issues
  • Features behind paywall
  • Forced ads
  • Deleted lifting history
  • Lost all logs with update
  • Weight limit restriction
Show 8 more
  • Reloads excessively
  • Wonky and now dead
  • Complicated and too much offered
  • Not intuitive for tracking
  • Buggy about dates and lifts
  • Cannot select other lifts
  • Only logs back squats
  • App copying content from clipboard

Requested features

7 requests
  • Allow editing of logs (date/time)
  • Manual entry for weight preferred over slider
  • Include different 1RM formulas (Epley, Brzycki)
  • Ability to create custom graphs
  • Fix weight limit restriction
Show 2 more
  • Allow logging of more than 1073 pounds
  • Update app

RXTime Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

One Rep Max

Subscriptions2
  • 1RM Pro Monthly$2.991 Month
  • 1RM Pro Annual7 Days trial$19.991 Year
One-time1
  • 1RM Pro Lifetime$49.99
None

RXTime Pro

No in-app purchases

Questions

Is One Rep Max free?
One Rep Max is free to download, with in-app purchases available.
Is RXTime Pro free?
RXTime Pro is free to download, with no in-app purchases.
Do One Rep Max or RXTime Pro have ads?
One Rep Max shows ads; RXTime Pro does not.
Which is updated more often, One Rep Max or RXTime Pro?
One Rep Max ships an update every 6 days, and RXTime Pro monthly. Most recently, One Rep Max was updated on October 23, 2026 and RXTime Pro on October 11, 2026.

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