# Private Kit vs Gas Volumeter

The clearest difference is in-app purchases: Private Kit at none against Gas Volumeter's 1. Private Kit also leads on update cadence (every 4 days vs every 2 months) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Gas Volumeter sells 1 one-off in-app purchase. Private Kit asks for nothing beyond the download.

Private Kit ships an update every 4 days, Gas Volumeter every 2 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Private Kit | Gas Volumeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (121 ratings)](https://appshunter.io/ios/app/private-kit/id1501903733/reviews)** | — |
| Number of ratings | **121** | — |
| Positive reviews | 32.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | Free | — |
| Size | 32 MB | 25 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Massachusetts Institute of Technology](https://appshunter.io/developer/353590322) | [Innervate](https://appshunter.io/developer/1184312610) |

## 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


### Gas Volumeter

[App page](https://appshunter.io/ios/app/gas-volumeter/id1661794690)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Private Kit free?

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

### Is Gas Volumeter free?

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

### Do Private Kit or Gas Volumeter have ads?

Neither Private Kit nor Gas Volumeter shows ads.

### Which is updated more often, Private Kit or Gas Volumeter?

Private Kit ships an update every 4 days, and Gas Volumeter every 2 months. Most recently, Private Kit was updated on October 25, 2026 and Gas Volumeter on October 25, 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.*