# IRONPRIMOS vs VOSTOK RX

The clearest difference is iOS requirement: VOSTOK RX at 13.4 against IRONPRIMOS's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | IRONPRIMOS | VOSTOK RX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 109 MB | 29 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Sport vmeste OOO](https://appshunter.io/developer/973915039) | [Fitbase](https://appshunter.io/developer/1530906929) |

## What reviewers say

### IRONPRIMOS

[App page](https://appshunter.io/ios/app/ironprimos/id6479983835)

**In-app purchases:** none


### VOSTOK RX

[App page](https://appshunter.io/ios/app/vostok-rx/id6744360256)

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

**In-app purchases:** none


## Frequently asked questions

### Is IRONPRIMOS free?

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

### Is VOSTOK RX free?

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

### Do IRONPRIMOS or VOSTOK RX have ads?

Neither IRONPRIMOS nor VOSTOK RX shows ads.

### Which is updated more often, IRONPRIMOS or VOSTOK RX?

IRONPRIMOS ships an update every 2 months, and VOSTOK RX every 2 months. Most recently, IRONPRIMOS was updated on October 11, 2026 and VOSTOK RX on November 5, 2026.

---

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