# Blue Days vs Mollzometer

The clearest difference is rating: Mollzometer at 5.0 against Blue Days's 4.2. Mollzometer also leads on in-app purchases (none vs 1) and update cadence (weekly vs fortnightly). Blue Days's advantage is ratings volume (238 vs 1) and iOS requirement (17.2 vs 26.4). On price, ads and device support there is nothing between them.

Both are free to download. Blue Days sells 1 in-app purchase, starting at $1.99 per year. Mollzometer asks for nothing beyond the download.

Mollzometer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Blue Days has 238 ratings behind it against 1, so its average is the more settled of the two.

Blue Days ships an update fortnightly, Mollzometer weekly. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Blue Days | Mollzometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (238 ratings)](https://appshunter.io/ios/app/blue-days/id1139504909/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mollzometer/id6765724288/reviews)** |
| Number of ratings | **238** | 1 |
| Positive reviews | 44.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 9 MB |
| Requires iOS | **17.2** | 26.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Bevins](https://appshunter.io/developer/1137750302) | [John Lawniczak](https://appshunter.io/developer/1882793043) |

## What reviewers say

### Blue Days

[App page](https://appshunter.io/ios/app/blue-days/id1139504909)

Get highly accurate, hyperlocal weather forecasts with a clean interface. View current conditions, detailed 7-day forecasts with temperature gradients, and hour-by-hour precipitation.

**Highlights:** Hyperlocal weather accuracy, Current conditions and descriptions, 7-day forecast with temperature gradients, Hour-by-hour precipitation slider, Customizable icon and color themes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Year Subscription | $1.99 | per year |


### Mollzometer

[App page](https://appshunter.io/ios/app/mollzometer/id6765724288)

This weather app focuses on the forecast for the specific hours you are active, filtering out irrelevant weather events. It provides personalized clothing suggestions based on your temperature preferences and delivers concise daily weather briefings.

**Highlights:** Customizable active hours for forecasts, Weather filtered to your daily schedule, Personalized clothing recommendations, Customizable temperature thresholds, Concise daily weather briefings, Smart weather alerts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Blue Days free?

Blue Days is free to download, with in-app purchases available.

### Is Mollzometer free?

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

### Which has better reviews, Blue Days or Mollzometer?

Mollzometer is rated higher. Blue Days averages 4.2 out of 5 from 238 ratings, while Mollzometer averages 5.0 from 1 ratings.

### Do Blue Days or Mollzometer have ads?

Neither Blue Days nor Mollzometer shows ads.

### Which is updated more often, Blue Days or Mollzometer?

Blue Days ships an update fortnightly, and Mollzometer weekly. Most recently, Blue Days was updated on October 21, 2026 and Mollzometer on October 6, 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.*