# FLOWBIO vs Negative Split

The clearest difference is review sentiment: Negative Split at 100% against FLOWBIO's 0%. Negative Split also leads on update cadence (daily vs fortnightly) and iOS requirement (18.2 vs 26.0). FLOWBIO's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, 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.

FLOWBIO ships an update fortnightly, Negative Split daily. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | FLOWBIO | Negative Split |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/flowbio/id1614407048/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Daily** |
| Monetization | **Free** | Ad-supported |
| Size | 37 MB | 6 MB |
| Requires iOS | 26.0 | **18.2** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [FLOWBIO LTD](https://appshunter.io/developer/1607898930) | [HECTOR SHERLOCK E STANLEY](https://appshunter.io/developer/1800456642) |

## What reviewers say

### FLOWBIO

[App page](https://appshunter.io/ios/app/flowbio/id1614407048)

This app analyzes sweat data to provide personalized hydration and recovery strategies for athletes. It connects to a sweat sensor to track fluid and sodium loss, offering tailored plans and pre-session predictions to optimize performance.

**Highlights:** Personalized hydration strategies, Tailored recovery plans, Pre-session performance predictions, Intake logging, Support for electrolyte brands, Integrations with Garmin, Wahoo, Zwift, Coros

**Features:** macOS Compatibility

**In-app purchases:** none


### Negative Split

[App page](https://appshunter.io/ios/app/negative-split/id6742900426)

This running app offers personalized training plans to help you achieve your race day goals. It integrates strength, recovery, and relaxation exercises to prevent injuries and improve performance.

**Highlights:** Personalized training plans, Run tracking, Strength training, Recovery exercises, Injury prevention

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FLOWBIO free?

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

### Is Negative Split free?

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

### Do FLOWBIO or Negative Split have ads?

Negative Split shows ads; FLOWBIO does not.

### Which is updated more often, FLOWBIO or Negative Split?

FLOWBIO ships an update fortnightly, and Negative Split daily. Most recently, FLOWBIO was updated on October 5, 2026 and Negative Split on October 2, 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.*