# Adiem vs Big Days

The clearest difference is price: Adiem at Free against Big Days's $0.99. Adiem also leads on rating (5.0 vs 4.5) and ratings volume (10 vs 2). Big Days's advantage is update cadence (weekly vs every 2 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Adiem is free to download; Big Days costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Adiem holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Adiem has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 77% and 77% positive.

Adiem ships an update every 2 months, Big Days weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Adiem | Big Days |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/adiem/id1562295627/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/big-days-date-countdown/id6759002825/reviews) |
| Number of ratings | **10** | 2 |
| Positive reviews | 76.9% of reviews | 76.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 35 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Adiem](https://appshunter.io/developer/1562295629) | [刚 王](https://appshunter.io/developer/1380585947) |

## What reviewers say

### Adiem

[App page](https://appshunter.io/ios/app/adiem/id1562295627)

This app uses personalized haptic rhythms based on your heart data to help you self-regulate and feel calm in social situations. It discreetly guides your body into a relaxed state through subtle vibrations on your wrist.

**Highlights:** Personalized haptic feedback, Apple Watch integration, Adaptive rhythm adjustment, Seamless and private operation, Supports emotional regulation, Based on heart data

**Features:** Apple Watch app

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Adiem free?

Adiem is free to download, with no in-app purchases.

### Is Big Days free?

Big Days costs $0.99, with no in-app purchases.

### Which has better reviews, Adiem or Big Days?

Adiem is rated higher. Adiem averages 5.0 out of 5 from 10 ratings, while Big Days averages 4.5 from 2 ratings.

### Do Adiem or Big Days have ads?

Neither Adiem nor Big Days shows ads.

### Which is updated more often, Adiem or Big Days?

Adiem ships an update every 2 months, and Big Days weekly. Most recently, Adiem was updated on November 3, 2026 and Big Days on November 5, 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.*