# FLOWBIO vs Sineco

The clearest difference is in-app purchases: FLOWBIO at none against Sineco's 2. Sineco's advantage is device support (4 vs 1) and iOS requirement (15.1 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Sineco sells 2 in-app purchases, starting at $7.99 per month. FLOWBIO asks for nothing beyond the download.

FLOWBIO ships an update fortnightly, Sineco every 2 weeks. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | FLOWBIO | Sineco |
| --- | --- | --- |
| 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 | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 37 MB | 70 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 12+ |
| Developer | [FLOWBIO LTD](https://appshunter.io/developer/1607898930) | [Sineco](https://appshunter.io/developer/1852718421) |

## 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


### Sineco

[App page](https://appshunter.io/ios/app/sineco/id6785854159)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sineco Premium | $7.99 | per month |
| Sineco Premium | $79.99 | per year |


## Frequently asked questions

### Is FLOWBIO free?

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

### Is Sineco free?

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

### Do FLOWBIO or Sineco have ads?

Neither FLOWBIO nor Sineco shows ads.

### Which is updated more often, FLOWBIO or Sineco?

FLOWBIO ships an update fortnightly, and Sineco every 2 weeks. Most recently, FLOWBIO was updated on October 5, 2026 and Sineco on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*