# Dri vs Don't Panic Call Us

The clearest difference is ads: Dri at none against Don't Panic Call Us's shown. Dri also leads on iOS requirement (13.0 vs 15.6). Don't Panic Call Us's advantage is update cadence (every 3 weeks vs every 13 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dri ships an update every 13 months, Don't Panic Call Us every 3 weeks. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Dri | Don't Panic Call Us |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (12 ratings)](https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 18 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Legend Brands](https://appshunter.io/developer/484266599) | [Vincent Beekel](https://appshunter.io/developer/1810774882) |

## What reviewers say

### Dri

[App page](https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596)

This utility app calculates essential drying environment variables. Input temperature and relative humidity to instantly get grains per pound (GPP). Advanced options allow calculation of vapor pressure and air dew point to material, with easy term definitions.

**Highlights:** Calculate grains per pound (GPP), Calculate vapor pressure, Calculate air dew point to material, Switch between F° and C°, Easy-access term definitions

**Features:** macOS Compatibility

**In-app purchases:** none


### Don't Panic Call Us

[App page](https://appshunter.io/ios/app/dont-panic-call-us/id6745105471)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dri free?

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

### Is Don't Panic Call Us free?

Don't Panic Call Us is free to download, with no in-app purchases.

### Do Dri or Don't Panic Call Us have ads?

Don't Panic Call Us shows ads; Dri does not.

### Which is updated more often, Dri or Don't Panic Call Us?

Dri ships an update every 13 months, and Don't Panic Call Us every 3 weeks. Most recently, Dri was updated on October 9, 2026 and Don't Panic Call Us on October 11, 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.*