# Evap Cooler vs Roost

The clearest difference is in-app purchases: Evap Cooler at none against Roost's 3. Evap Cooler also leads on update cadence (daily vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Roost sells 3 in-app purchases, starting at $3.39 per month. Evap Cooler asks for nothing beyond the download.

Evap Cooler ships an update daily, Roost every 2 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Evap Cooler | Roost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/evap-cooler/id6450683809/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | Free | — |
| Size | 74 MB | 29 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lawson Mechanical Engineering LLC](https://appshunter.io/developer/517603315) | [Ruth McCarthy](https://appshunter.io/developer/6787998193) |

## What reviewers say

### Evap Cooler

[App page](https://appshunter.io/ios/app/evap-cooler/id6450683809)

Assess the performance and water usage of your evaporative cooler. This app provides crucial data for homeowners considering installing a new unit, helping you make a well-informed decision.

**Highlights:** Performance assessment, Water usage tracking, Informed purchasing decisions, Economical cooling alternative information

**Features:** macOS Compatibility

**In-app purchases:** none


### Roost

[App page](https://appshunter.io/ios/app/roost-chicken-and-egg-tracker/id6789991413)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Roost Pro Monthly | $3.39 | per month |
| Roost Pro Yearly | $14.90 | per year |
| Roost Pro Lifetime | $26.49 | one-time |


## Frequently asked questions

### Is Evap Cooler free?

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

### Is Roost free?

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

### Do Evap Cooler or Roost have ads?

Neither Evap Cooler nor Roost shows ads.

### Which is updated more often, Evap Cooler or Roost?

Evap Cooler ships an update daily, and Roost every 2 weeks. Most recently, Evap Cooler was updated on November 3, 2026 and Roost on November 10, 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.*