# Flex Success vs KillaFit

The clearest difference is update cadence: KillaFit at every 2 days against Flex Success's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flex Success sells 1 in-app purchase, starting at $99.99 per month and KillaFit sells 1 in-app purchase, starting at $50.00 per month. Whichever you choose, the download price is not the number that matters.

Flex Success ships an update every 2 months, KillaFit every 2 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Flex Success | KillaFit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 52 MB | 59 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Flex Success FZCO](https://appshunter.io/developer/1688449298) | [DANIEL VASILE CHILARIU](https://appshunter.io/developer/1877862255) |

## What reviewers say

### Flex Success

[App page](https://appshunter.io/ios/app/flex-success/id6449265025)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Online Coaching | $99.99 | per month |


### KillaFit

[App page](https://appshunter.io/ios/app/killafit-online-coaching/id6759284986)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KillaFit | $50.00 | per month |


## Frequently asked questions

### Is Flex Success free?

Flex Success is free to download, with in-app purchases available.

### Is KillaFit free?

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

### Do Flex Success or KillaFit have ads?

Neither Flex Success nor KillaFit shows ads.

### Which is updated more often, Flex Success or KillaFit?

Flex Success ships an update every 2 months, and KillaFit every 2 days. Most recently, Flex Success was updated on October 27, 2026 and KillaFit on October 25, 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.*