# Sis vs Power Within

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

Both are free to download. Power Within sells 2 in-app purchases, starting at $23.99 per month. Sis asks for nothing beyond the download.

Sis ships an update every 3 months, Power Within fortnightly. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Sis | Power Within |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sis/id6746260505/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 181 MB | 124 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DT HEALTH AND FITNESS COACHING LTD](https://appshunter.io/developer/1815958163) | [Global Fitness Holdings Ltd](https://appshunter.io/developer/1490993741) |

## What reviewers say

### Sis

[App page](https://appshunter.io/ios/app/sis/id6746260505)

A strength training platform designed exclusively for women, offering expert-led workouts, mental resilience tools, and a supportive community. Achieve your fitness goals at your own pace, whether at home or in the gym.

**Highlights:** Structured strength programs for all levels, Realistic resilience tools and guidance, Supportive sisterhood community, Progress tracking for physical and mental wins, Live classes and challenges, Diverse training styles (bodyweight, kettlebell, etc.)

**Features:** macOS Compatibility

**In-app purchases:** none


### Power Within

[App page](https://appshunter.io/ios/app/power-within/id6758092049)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $23.99 | per month |
| Annual Subscription | $239.99 | per year |


## Frequently asked questions

### Is Sis free?

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

### Is Power Within free?

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

### Do Sis or Power Within have ads?

Neither Sis nor Power Within shows ads.

### Which is updated more often, Sis or Power Within?

Sis ships an update every 3 months, and Power Within fortnightly. Most recently, Sis was updated on October 24, 2026 and Power Within on October 18, 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.*