# PADI AWARE vs Secchi

The clearest difference is update cadence: PADI AWARE at monthly against Secchi's every 7 months. PADI AWARE also leads on iOS requirement (13.0 vs 15.6). On price, ads, 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.

PADI AWARE ships an update monthly, Secchi every 7 months. The most recent releases landed on September 4, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PADI AWARE | Secchi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free | — |
| Size | 85 MB | 45 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PADI AWARE Foundation](https://appshunter.io/developer/1800734511) | [The Secchi Disk Foundation](https://appshunter.io/developer/1487320010) |

## What reviewers say

### PADI AWARE

[App page](https://appshunter.io/ios/app/padi-aware/id1260943783)

This app empowers users to find, track, and share conservation actions for ocean health. It supports initiatives like marine debris removal and citizen science, connecting individuals to a global movement for a healthier blue planet.

**Highlights:** Find conservation actions, Track conservation efforts, Share impactful actions, Support marine debris removal, Advocate for marine protected areas, Participate in citizen science

**Features:** Vision Pro support

**In-app purchases:** none


### Secchi

[App page](https://appshunter.io/ios/app/secchi/id1524837284)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PADI AWARE free?

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

### Is Secchi free?

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

### Do PADI AWARE or Secchi have ads?

Neither PADI AWARE nor Secchi shows ads.

### Which is updated more often, PADI AWARE or Secchi?

PADI AWARE ships an update monthly, and Secchi every 7 months. Most recently, PADI AWARE was updated on September 4, 2026 and Secchi on September 23, 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.*