# Proofmode vs f/oss

The clearest difference is in-app purchases: Proofmode at none against f/oss's 3. Proofmode also leads on iOS requirement (16 vs 26.0). f/oss's advantage is update cadence (every 6 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. f/oss sells 3 one-off in-app purchases. Proofmode asks for nothing beyond the download.

Proofmode ships an update every 3 months, f/oss every 6 days. The most recent releases landed on July 21, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | Proofmode | f/oss |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/proofmode/id1526270484/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 36 MB | 1 MB |
| Requires iOS | **16** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Postmodern Apps LLC](https://appshunter.io/developer/1071768141) | [Luca Tescari](https://appshunter.io/developer/1633824637) |

## What reviewers say

### Proofmode

[App page](https://appshunter.io/ios/app/proofmode/id1526270484)

This app provides a secure way to authenticate and verify multimedia content from the moment it's captured. It uses advanced technology to ensure the chain of custody and provide proof of authenticity for both activists and everyday users.

**Highlights:** Multimedia content authentication, Verification from point of capture, Enhanced sensor-driven metadata, Hardware fingerprinting, Cryptographic signing, Supports C2PA standard

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

**In-app purchases:** none


### f/oss

[App page](https://appshunter.io/ios/app/foss/id6761634199)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nice Tip | $1.99 | one-time |
| Generous Tip | $5.99 | one-time |
| Amazing Tip | $9.99 | one-time |


## Frequently asked questions

### Is Proofmode free?

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

### Is f/oss free?

f/oss is free to download, with in-app purchases available.

### Do Proofmode or f/oss have ads?

Neither Proofmode nor f/oss shows ads.

### Which is updated more often, Proofmode or f/oss?

Proofmode ships an update every 3 months, and f/oss every 6 days. Most recently, Proofmode was updated on July 21, 2026 and f/oss on August 28, 2026.

---

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