Comparison

Big Days vs iMuscleMap

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

Head to head
About

Big Days

A minimalist app to track important future and past dates with a clean interface. Easily manage events, add notes, and receive local reminders. Offers home screen widgets for quick access.

Highlights
  • Count down and count up for events
  • Highlight events happening today
  • Edit, pin, and add notes to events
  • Home screen widgets for progress
  • Local reminders with repeat rules
  • iCloud sync across devices
Features
Read full description

Big Days is a minimalist app focused on managing your important dates. Why choose Big Days: Native experience: Built with SwiftUI and iOS-native interactions for smooth and stable performance Minimal design: Clear information hierarchy so your most important dates are visible at a glance Simple workflow: Create events in just a few steps with no learning curve Core features: Count down and count up: Track days remaining for future events and days passed for past events Today highlight: Events happening today are clearly emphasized so you never miss a key moment Event management: Edit, pin, add notes, and delete events easily Memory notes: Add multiple notes to each event to keep long-term memories Home screen widgets: Check key event progress directly from your Home Screen Local reminders: Flexible reminder preferences and repeat rules Languages and themes: Supports Chinese and English, with Auto, Light, and Dark appearance iCloud sync: Keep your data in sync across devices when enabled Great for birthdays, anniversaries, paydays, exams, trips, project milestones, and holiday countdowns. Big Days is built to stay lightweight, clear, and dependable, so every important date gets the attention it deserves.

About

iMuscleMap

Track your strength training progress with a visual muscle map. Monitor muscle recovery, identify weak areas, and access structured training plans and an exercise library. Log workouts in real-time and gain insights into your progress.

Highlights
  • Visual Muscle Map
  • Structured Training Plans
  • Exercise Library
  • Real-time Workout Logging
  • Recovery and Progress Insights
  • Supports Gym, Home, and Bodyweight Workouts
Features
Read full description

Muscle Map is a strength training and workout tracker built around a visual muscle map. Instead of only logging sets, reps, and weight, Muscle Map helps you see how every workout affects your body. Track trained muscles, monitor recovery, spot weak areas, and plan your next session with more confidence. Key features: • Visual Muscle Map See the status of 14 major muscle groups across your chest, back, shoulders, arms, core, glutes, and legs. • Structured Training Plans Choose plans based on your goal, experience level, and training setup, including beginner full-body training, push pull legs, dumbbell hypertrophy, fat loss, and bodyweight workouts. • Exercise Library Browse strength exercises with target muscles, step-by-step instructions, common mistakes, recommended sets, and alternatives. • Workout Logging Track weight, reps, RPE, completed sets, and workout duration. During a session, Muscle Map shows which muscles you are training in real time. • Recovery and Progress Insights Review muscle intensity, recovery status, weekly progress, training volume, muscle coverage, and personal records. • Built for Different Training Setups Use Muscle Map at the gym, at home with dumbbells, or with bodyweight-only workouts. Muscle Map is designed for lifters who want more structure, better muscle balance, and a clearer view of their training progress. Note: Muscle Map provides workout tracking and fitness reference information only. It is not medical advice. Please train according to your own health and fitness level. Apple Official User Documentation (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Big Days4 screens
iMuscleMap4 screens

Verdict

The call

The clearest difference is review sentiment: Big Days at 77% against iMuscleMap's 20%. Big Days also leads on rating (4.5 vs 3.0) and in-app purchases (none vs 3). On price, ratings volume, ads 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. iMuscleMap sells 3 in-app purchases, starting at $1.99 per month. Big Days asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Big Days holds the better App Store score, 4.5 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 77% of Big Days's written reviews are positive against 20% of iMuscleMap's.

UpkeepUpdate frequency

Big Days ships an update weekly, iMuscleMap every 3 weeks. Both last shipped on October 31, 2026.

Scorecard6 real differences · 4 level
Big Days versus iMuscleMap: the parameters behind the verdict, then further details
ParameterBig DaysiMuscleMap
PriceFreeFree
Rating4.5 (2 ratings) — better3.0 (2 ratings)
Positive reviews76.9% of reviews — better20.0% of reviews
Number of ratings22
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhoneiPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size3 MB9 MB
Age rating9+4+
Developer刚 王Naihe Hu

Customer experience

Big Days

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive76.9%
Neutral23.1%
Negative0.0%

iMuscleMap

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

In-app purchases

None

Big Days

No in-app purchases

3 purchases

iMuscleMap

Subscriptions2
  • MonthlyPro$1.991 Month
  • YearlyPro$14.991 Year
One-time1
  • Life Time ProFree

Questions

Is Big Days free?
Big Days is free to download, with no in-app purchases.
Is iMuscleMap free?
iMuscleMap is free to download, with in-app purchases available.
Which has better reviews, Big Days or iMuscleMap?
Big Days is rated higher. Big Days averages 4.5 out of 5 from 2 ratings, while iMuscleMap averages 3.0 from 2 ratings.
Do Big Days or iMuscleMap have ads?
Neither Big Days nor iMuscleMap shows ads.
Which is updated more often, Big Days or iMuscleMap?
Big Days ships an update weekly, and iMuscleMap every 3 weeks. Most recently, Big Days was updated on October 31, 2026 and iMuscleMap on October 31, 2026.

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