# Humidity Calc vs Sticky or Dry

The clearest difference is in-app purchases: Humidity Calc at none against Sticky or Dry's 1. Humidity Calc also leads on iOS requirement (17.6 vs 26.0). Sticky or Dry's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Sticky or Dry sells 1 in-app purchase, starting at $2.99 per year. Humidity Calc asks for nothing beyond the download.

Humidity Calc ships an update every 3 weeks, Sticky or Dry every 10 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Humidity Calc | Sticky or Dry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 38 MB | 5 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hiroaki Oosawa](https://appshunter.io/developer/6797133579) | [Arcana Media](https://appshunter.io/developer/1526506285) |

## What reviewers say

### Humidity Calc

[App page](https://appshunter.io/ios/app/humidity-calc/id6797133577)

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

**In-app purchases:** none


### Sticky or Dry

[App page](https://appshunter.io/ios/app/sticky-or-dry/id6799988064)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sticky or Dry Pro Yearly | $2.99 | per year |


## Frequently asked questions

### Is Humidity Calc free?

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

### Is Sticky or Dry free?

Sticky or Dry is free to download, with in-app purchases available.

### Do Humidity Calc or Sticky or Dry have ads?

Humidity Calc shows ads; Sticky or Dry does not.

### Which is updated more often, Humidity Calc or Sticky or Dry?

Humidity Calc ships an update every 3 weeks, and Sticky or Dry every 10 days. Most recently, Humidity Calc was updated on October 31, 2026 and Sticky or Dry 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.*