# Hygrometer vs MOON

The clearest difference is ads: MOON at none against Hygrometer's shown. MOON also leads on review sentiment (85% vs 53%) and update cadence (weekly vs every 3 weeks). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Hygrometer sells 2 one-off in-app purchases and MOON sells 11 in-app purchases, starting at $11.99 per year. Whichever you choose, the download price is not the number that matters.

MOON holds the better App Store score, 4.8 against 4.7. Both are backed by a comparable volume of ratings — 6.1K and 30K respectively. Written reviews point the same way: 53% of Hygrometer's written reviews are positive against 85% of MOON's.

Hygrometer ships an update every 3 weeks, MOON weekly. Both last shipped on October 21, 2026.

## The numbers

| Metric | Hygrometer | MOON |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6.1K ratings)](https://appshunter.io/ios/app/hygrometer-humidity/id515673004/reviews) | **[4.8 (30K ratings)](https://appshunter.io/ios/app/moon-current-moon-phase/id660036257/reviews)** |
| Number of ratings | 6.1K | **30K** |
| Positive reviews | 52.9% of reviews | **85.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #125 | **#37** |
| Size | 114 MB | 143 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MORETHAN APPS](https://appshunter.io/developer/473001840) | [MOON CALENDAR](https://appshunter.io/developer/1709661622) |

## What reviewers say

### Hygrometer

[App page](https://appshunter.io/ios/app/hygrometer-humidity/id515673004)

**Currently charting:** #125 Top Free · Weather (US App Store)

This application provides real-time outdoor humidity readings for your current location. It features an easy-to-read analog design and is compatible with iPhone, iPad, and Apple Watch.

**Highlights:** Real-time outdoor humidity, Current location readings, Analog design, iPhone/iPad support, Apple Watch support

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |
| Buy me a coffee | $2.99 | one-time |

**What reviewers like**

- 🚀 Accurate humidity readings
- 👍 Simple and easy to use
- 👍 Helpful for monitoring humidity levels
- 👍 Useful for specific needs (e.g., guitar storage, painting)

**What reviewers complain about**

- 🐛 Inaccurate humidity readings
- 🐛 Inconsistent performance, app crashes
- 🔋 Drains battery
- 📍 Provides location-based data, not actual indoor measurements

**Reported bugs**

- App crashes on startup
- Humidity readings are wildly inaccurate
- Location tracking issues

**Requested features**

- Add temperature information
- Include indoor humidity monitoring
- Provide humidity trend/forecast
- Add ability to set humidity alerts/notifications


### MOON

[App page](https://appshunter.io/ios/app/moon-current-moon-phase/id660036257)

**Currently charting:** #37 Top Free · Weather, #84 Top Grossing · Weather (US App Store)

Track lunar cycles with this comprehensive moon phase calendar. Get notifications for key events, view moon phases for any date, and share lunar imagery with friends. Features offline access and home screen widgets.

**Highlights:** Current moon phase viewing, Lunar event notifications, Home screen widget, Moon phase lookup for any date, Social sharing of moon imagery, Offline functionality

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MOON Pro Yearly (NT) | $11.99 | per year |
| MOON Pro Yearly | $11.99 | per year |
| MOON Pro Yearly | $19.99 | per year |
| MOON Pro Yearly | $19.99 | per year |
| MOON Limited Time Offer | $19.99 | per year |
| MOON Pro Yearly 50% Off | $19.99 | per year |
| MOON Pro (Yearly) | $24.99 | per year |
| MOON Pro (Yearly NT) | $24.99 | per year |
| MOON Ambassador | $4.99 | one-time |
| MOON Supporter | $9.99 | one-time |
| MOON Patron | $49.99 | one-time |

**What reviewers like**

- 🌟 Gorgeous design
- 👍 Accurate moon phase tracking
- 💡 Quirky notification messages
- 🎨 Beautiful widget
- 🙂 Calming and peaceful

**What reviewers complain about**

- 🔍 Lacking additional moon-related features
- 💰 Subscription model for some features
- 🔊 Loud notification sounds
- 🌍 Not optimized for Southern Hemisphere

**Reported bugs**

- Widget not working for some users
- Moon phase information inaccurate on certain dates

**Requested features**

- Add moon rise and set times
- Include information on lunar events like eclipses
- Allow customization of notification sounds
- Provide Southern Hemisphere moon phase view


## Frequently asked questions

### Is Hygrometer free?

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

### Is MOON free?

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

### Which has better reviews, Hygrometer or MOON?

MOON is rated higher. Hygrometer averages 4.7 out of 5 from 6.1K ratings, while MOON averages 4.8 from 30K ratings.

### Do Hygrometer or MOON have ads?

Hygrometer shows ads; MOON does not.

### Which is updated more often, Hygrometer or MOON?

Hygrometer ships an update every 3 weeks, and MOON weekly. Most recently, Hygrometer was updated on October 21, 2026 and MOON on October 21, 2026.

### Which is more popular, Hygrometer or MOON?

Hygrometer currently peaks at #125 in the App Store charts, and MOON at #37. Chart position reflects recent download velocity rather than total install base.

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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.*