# Perform Fitness vs KnowWhen

The clearest difference is price: Perform Fitness at Free against KnowWhen's $4.99. Perform Fitness also leads on update cadence (every 6 weeks vs every 3 months) and device support (4 vs 1). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Perform Fitness is free to download; KnowWhen costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Perform Fitness against 5.0 for KnowWhen. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Perform Fitness ships an update every 6 weeks, KnowWhen every 3 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Perform Fitness | KnowWhen |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/perform-fitness/id1665753688/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/knowwhen/id6758948095/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 176 MB | 6 MB |
| Requires iOS | **15.5** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | +17 |
| Developer | [Perform Fitness (PTY) LTD](https://appshunter.io/developer/1665753690) | [Launch Round](https://appshunter.io/developer/1580265297) |

## What reviewers say

### Perform Fitness

[App page](https://appshunter.io/ios/app/perform-fitness/id1665753688)

This app provides personalized workout programs and tracks your progress, nutrition, and habits with the guidance of a coach. It offers exercise videos, community support, and integrates with various wearable devices and health apps.

**Highlights:** Access training plans and track workouts, Follow exercise and workout videos, Track meals and make better food choices, Set health and fitness goals and track progress, Message your coach in real-time, Connect with digital communities, Track body measurements and progress photos

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none


### KnowWhen

[App page](https://appshunter.io/ios/app/knowwhen/id6758948095)

This app offers simple, timely guidance for husbands based on their partner's cycle. It helps users understand when to offer support, listen, or give space, fostering better connection and reducing relationship tension.

**Highlights:** Daily simple guidance, Phase-based reminders, Private logging for patterns, Discreet data storage on device, Guidance on giving space, Guidance on offering support

**In-app purchases:** none


## Frequently asked questions

### Is Perform Fitness free?

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

### Is KnowWhen free?

KnowWhen costs $4.99, with no in-app purchases.

### Which has better reviews, Perform Fitness or KnowWhen?

Perform Fitness and KnowWhen are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Perform Fitness or KnowWhen have ads?

Neither Perform Fitness nor KnowWhen shows ads.

### Which is updated more often, Perform Fitness or KnowWhen?

Perform Fitness ships an update every 6 weeks, and KnowWhen every 3 months. Most recently, Perform Fitness was updated on November 3, 2026 and KnowWhen on November 6, 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.*