# STRONG by Erika Hammond vs FlexWheeler Development System

The clearest difference is update cadence: STRONG by Erika Hammond at every 2 months against FlexWheeler Development System's every 50 months. FlexWheeler Development System's advantage is iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. STRONG by Erika Hammond sells 4 in-app purchases, starting at $19.99 per month and FlexWheeler Development System sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

STRONG by Erika Hammond ships an update every 2 months, FlexWheeler Development System every 50 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | STRONG by Erika Hammond | FlexWheeler Development System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (66 ratings)](https://appshunter.io/ios/app/strong-by-erika-hammond/id1533881157/reviews)** | — |
| Number of ratings | **66** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 50 months |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 25 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Strong Collective, LLC](https://appshunter.io/developer/1533881159) | [The GOAT 33, Inc.](https://appshunter.io/developer/1550536576) |

## What reviewers say

### STRONG by Erika Hammond

[App page](https://appshunter.io/ios/app/strong-by-erika-hammond/id1533881157)

Access a library of boxing-inspired cardio, HIIT, strength, and sculpt workouts. Achieve a champion mindset and a knockout body with curated programs and community support. Try it free for 7 days.

**Highlights:** On-demand boxing-inspired workouts, Curated fitness programs and challenges, Workout schedules for accountability, Private community for support, Signature workouts like BOXAPALOOZA and TOTAL BODY KNOCKOUT, Offline workout downloads

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Strong Collective Monthly | $19.99 | per month |
| MONTHLY | $19.99 | per month |
| The Strong Collective Yearly | $194.99 | per year |
| YEARLY | $194.99 | per year |

**What reviewers like**

- 💪 Amazing and challenging workouts
- ⚡ Erika's energetic and motivating personality
- 👍 Great sound and video quality
- 🧠 Helps users focus and push through workouts
- 🤸‍♀️ Workouts are doable and scalable for all levels

**What reviewers complain about**

- 📉 Number of new workouts released dramatically decreased after Sweat and Shred 2.0
- 🗓️ Numerous weeks with less than 4 workouts
- 🚫 A few weeks with no new workouts

**Requested features**

- More new workouts released weekly
- Increase the frequency of new workout content


### FlexWheeler Development System

[App page](https://appshunter.io/ios/app/flexwheeler-development-system/id1550536574)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Training and Nutrition Package | $299.99 | one-time |


## Frequently asked questions

### Is STRONG by Erika Hammond free?

STRONG by Erika Hammond is free to download, with in-app purchases available.

### Is FlexWheeler Development System free?

FlexWheeler Development System is free to download, with in-app purchases available.

### Do STRONG by Erika Hammond or FlexWheeler Development System have ads?

Neither STRONG by Erika Hammond nor FlexWheeler Development System shows ads.

### Which is updated more often, STRONG by Erika Hammond or FlexWheeler Development System?

STRONG by Erika Hammond ships an update every 2 months, and FlexWheeler Development System every 50 months. Most recently, STRONG by Erika Hammond was updated on November 3, 2026 and FlexWheeler Development System on November 3, 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.*