# Primus vs SOFAST Groundwork

The clearest difference is in-app purchases: Primus at none against SOFAST Groundwork's 2. SOFAST Groundwork's advantage is update cadence (every 10 days vs every 3 weeks) and ratings volume (5 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. SOFAST Groundwork sells 2 in-app purchases, starting at $4.99 per month. Primus asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Primus against 5.0 for SOFAST Groundwork. That said, the two scores are not equally well evidenced: SOFAST Groundwork has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Primus ships an update every 3 weeks, SOFAST Groundwork every 10 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Primus | SOFAST Groundwork |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/primus-navy-seal-workouts/id1497423828/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/sofast-groundwork/id6761746157/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 29 MB | 44 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Flywheel Limited](https://appshunter.io/developer/1497423827) | [JEFFREY LEE ADAMS](https://appshunter.io/developer/1861681172) |

## What reviewers say

### Primus

[App page](https://appshunter.io/ios/app/primus-navy-seal-workouts/id1497423828)

This app provides a 26-week Special Forces training program designed to prepare users for military selection. It combines daily running, swimming, and strength workouts with adaptable progressions and endurance programming.

**Highlights:** 26-week Special Forces training program, Daily running, swimming, and strength workouts, Endurance programming, Bodyweight strength exercises, Flexible lifting blocks, Scalable progressions

**In-app purchases:** none


### SOFAST Groundwork

[App page](https://appshunter.io/ios/app/sofast-groundwork/id6761746157)

This app is a workout companion for tactical athletes, offering a variety of training programs and tracking capabilities. Log workouts, participate in daily challenges, and connect with a community of like-minded individuals. Unlock advanced features and analytics with a premium subscription.

**Highlights:** Workout logging with 3 tiers, Hero and benchmark workouts, Daily workout of the day, Built-in interval timer, Global leaderboards, Community whiteboard, Personal record card sharing

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Groundwork Pro Monthly | $4.99 | per month |
| Groundwork Pro Annual | $34.99 | per year |


## Frequently asked questions

### Is Primus free?

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

### Is SOFAST Groundwork free?

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

### Which has better reviews, Primus or SOFAST Groundwork?

Primus and SOFAST Groundwork are both rated 5.0 out of 5 on the App Store, from 1 and 5 ratings respectively.

### Do Primus or SOFAST Groundwork have ads?

Neither Primus nor SOFAST Groundwork shows ads.

### Which is updated more often, Primus or SOFAST Groundwork?

Primus ships an update every 3 weeks, and SOFAST Groundwork every 10 days. Most recently, Primus was updated on October 22, 2026 and SOFAST Groundwork on October 24, 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.*