# Private Kit vs Auth NFC

The clearest difference is rating: Auth NFC at 5.0 against Private Kit's 3.7. Private Kit's advantage is update cadence (every 4 days vs every 4 months) and ratings volume (121 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Auth NFC holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Private Kit has 121 ratings behind it against 2, so its average is the more settled of the two.

Private Kit ships an update every 4 days, Auth NFC every 4 months. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Private Kit | Auth NFC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (121 ratings)](https://appshunter.io/ios/app/private-kit/id1501903733/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/auth-nfc/id6504435036/reviews)** |
| Number of ratings | **121** | 2 |
| Positive reviews | 32.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | Free | Free |
| Size | 32 MB | 4 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Massachusetts Institute of Technology](https://appshunter.io/developer/353590322) | [Thomas Wixson](https://appshunter.io/developer/645728649) |

## What reviewers say

### Private Kit

[App page](https://appshunter.io/ios/app/private-kit/id1501903733)

This app allows you to log your GPS trails directly on your phone. All data is stored locally and remains private until you choose to export it. It efficiently stores location history with minimal space usage.

**Highlights:** Privacy-first location logging, Local data storage, Manual data export, Efficient data storage, Location import/export

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

**In-app purchases:** none

**What reviewers like**

- 💡 Great idea for contact tracing
- 🔒 Private data logging
- 👍 Appreciated effort by MIT
- 🚀 Potential to slow virus spread
- 👍 Can log location without app open

**What reviewers complain about**

- ❓ Confusing and unclear UI/UX
- 🐛 Frequent app crashes
- 🤷 No idea how to use it
- 📉 Poor execution and polish
- 🚫 No support or response

**Reported bugs**

- App crashes when trying to view movements on map
- Map crashes/closes app before loading
- App crashes when trying to open map
- App crashes when trying to view overlaps
- Map shows zoomed out view and crashes

**Requested features**

- Better howto and help information
- More rigorous and robust app development
- Simple notebook feature for user contacts
- Clearer explanation of map features (green targets, red pins)
- Option to add locations when without phone


### Auth NFC

[App page](https://appshunter.io/ios/app/auth-nfc/id6504435036)

This app provides a secure way to manage your accounts using NFC technology for an extra layer of protection. It allows for easy import/export of accounts and offers options to store secrets locally or on external NFC tags and YubiKeys.

**Highlights:** NFC-based security, Import/export accounts, Store secrets on NFC tags/YubiKeys, Two-factor authentication, QR code backups

**In-app purchases:** none


## Frequently asked questions

### Is Private Kit free?

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

### Is Auth NFC free?

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

### Which has better reviews, Private Kit or Auth NFC?

Auth NFC is rated higher. Private Kit averages 3.7 out of 5 from 121 ratings, while Auth NFC averages 5.0 from 2 ratings.

### Do Private Kit or Auth NFC have ads?

Neither Private Kit nor Auth NFC shows ads.

### Which is updated more often, Private Kit or Auth NFC?

Private Kit ships an update every 4 days, and Auth NFC every 4 months. Most recently, Private Kit was updated on September 29, 2026 and Auth NFC on September 26, 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.*