# Big Days vs iMuscleMap

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.

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.

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.

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

## The numbers

| Metric | Big Days | iMuscleMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/big-days-date-countdown/id6759002825/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/imusclemap/id6775289514/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **76.9% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Paid | **Freemium** |
| Size | 3 MB | 9 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [刚 王](https://appshunter.io/developer/1380585947) | [Naihe Hu](https://appshunter.io/developer/564180065) |

## What reviewers say

### Big Days

[App page](https://appshunter.io/ios/app/big-days-date-countdown/id6759002825)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### iMuscleMap

[App page](https://appshunter.io/ios/app/imusclemap/id6775289514)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MonthlyPro | $1.99 | per month |
| YearlyPro | $14.99 | per year |
| Life Time Pro | Free | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*