# YSJActive vs Sip

The clearest difference is update cadence: Sip at weekly against YSJActive's every 17 months. YSJActive's advantage is iOS requirement (15.6 vs 18.6). 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.

YSJActive ships an update every 17 months, Sip weekly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | YSJActive | Sip |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sip-dynamic-hydration/id6764423318/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Weekly** |
| Monetization | — | Free |
| Size | 31 MB | 6 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [York St. John Computer Science](https://appshunter.io/developer/1176161702) | [Michael Brockman](https://appshunter.io/developer/1212422162) |

## What reviewers say

### YSJActive

[App page](https://appshunter.io/ios/app/ysjactive/id1669482436)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sip

[App page](https://appshunter.io/ios/app/sip-dynamic-hydration/id6764423318)

This app tracks hydration by modeling your body's real-time fluid status using a decay algorithm. It automatically adjusts your daily water intake goals based on weather and activity, syncing seamlessly with Apple Health.

**Highlights:** Real-time hydration decay modeling, Adaptive goal setting, One-tap Quick Log buttons, Live Activity & Dynamic Island support, Interactive Widgets, Deep Apple Health integration, Streak motivation system

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

**In-app purchases:** none


## Frequently asked questions

### Is YSJActive free?

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

### Is Sip free?

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

### Do YSJActive or Sip have ads?

Neither YSJActive nor Sip shows ads.

### Which is updated more often, YSJActive or Sip?

YSJActive ships an update every 17 months, and Sip weekly. Most recently, YSJActive was updated on October 25, 2026 and Sip on October 31, 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.*