# Radius PPM vs TrackSubApp

The clearest difference is in-app purchases: Radius PPM at none against TrackSubApp's 2. TrackSubApp's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TrackSubApp sells 2 in-app purchases, starting at $1.00 per month. Radius PPM asks for nothing beyond the download.

Radius PPM ships an update every 2 months, TrackSubApp every 3 weeks. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Radius PPM | TrackSubApp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 43 MB | 46 MB |
| Requires iOS | **14** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Radius Synergies International Private Limited](https://appshunter.io/developer/880536127) | [Bidya Bhushan Bibhu](https://appshunter.io/developer/1866222319) |

## What reviewers say

### Radius PPM

[App page](https://appshunter.io/ios/app/radius-ppm/id1662983744)

**Features:** macOS Compatibility

**In-app purchases:** none


### TrackSubApp

[App page](https://appshunter.io/ios/app/tracksubapp/id6757342390)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.00 | per month |
| Pro Yearly | $11.00 | per year |


## Frequently asked questions

### Is Radius PPM free?

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

### Is TrackSubApp free?

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

### Do Radius PPM or TrackSubApp have ads?

Neither Radius PPM nor TrackSubApp shows ads.

### Which is updated more often, Radius PPM or TrackSubApp?

Radius PPM ships an update every 2 months, and TrackSubApp every 3 weeks. Most recently, Radius PPM was updated on September 17, 2026 and TrackSubApp on September 8, 2026.

---

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