# CSUB SRC vs FutureFLEX

The clearest difference is update cadence: FutureFLEX at every 3 months against CSUB SRC's every 17 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CSUB SRC ships an update every 17 months, FutureFLEX every 3 months. The most recent releases landed on September 21, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | CSUB SRC | FutureFLEX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/futureflex/id6751572772/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 43 MB | 31 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [InnoSoft Canada Inc.](https://appshunter.io/developer/672385534) | [Future Flex LLC](https://appshunter.io/developer/1835860250) |

## What reviewers say

### CSUB SRC

[App page](https://appshunter.io/ios/app/csub-src/id1535847257)

**In-app purchases:** none


### FutureFLEX

[App page](https://appshunter.io/ios/app/futureflex/id6751572772)

Easily book fitness classes and manage your entire fitness journey from your mobile device. Make reservations, join waitlists, and check your membership status on the go.

**Highlights:** Book fitness classes, Manage reservations, Join waitlists, Check profile and membership status, Access anytime, anywhere

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CSUB SRC free?

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

### Is FutureFLEX free?

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

### Do CSUB SRC or FutureFLEX have ads?

Neither CSUB SRC nor FutureFLEX shows ads.

### Which is updated more often, CSUB SRC or FutureFLEX?

CSUB SRC ships an update every 17 months, and FutureFLEX every 3 months. Most recently, CSUB SRC was updated on September 21, 2026 and FutureFLEX on June 5, 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.*