# Pollution Guardian vs Deadlines reminder

The clearest difference is in-app purchases: Pollution Guardian at none against Deadlines reminder's 1. Pollution Guardian also leads on ads (none vs shown). Deadlines reminder's advantage is update cadence (every 2 months vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Deadlines reminder sells 1 in-app purchase, starting at $2.99 per year. Pollution Guardian asks for nothing beyond the download.

Pollution Guardian ships an update every 5 months, Deadlines reminder every 2 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Pollution Guardian | Deadlines reminder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Size | 51 MB | 51 MB |
| Requires iOS | 16.2 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pollution srl](https://appshunter.io/developer/1448845103) | [Thomas Sambugaro](https://appshunter.io/developer/1654147996) |

## What reviewers say

### Pollution Guardian

[App page](https://appshunter.io/ios/app/pollution-guardian/id1448845104)

**Features:** macOS Compatibility

**In-app purchases:** none


### Deadlines reminder

[App page](https://appshunter.io/ios/app/deadlines-reminder/id6741763061)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $2.99 | per year |


## Frequently asked questions

### Is Pollution Guardian free?

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

### Is Deadlines reminder free?

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

### Do Pollution Guardian or Deadlines reminder have ads?

Deadlines reminder shows ads; Pollution Guardian does not.

### Which is updated more often, Pollution Guardian or Deadlines reminder?

Pollution Guardian ships an update every 5 months, and Deadlines reminder every 2 months. Most recently, Pollution Guardian was updated on October 25, 2026 and Deadlines reminder on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*