# Vi Training vs HydrosenseAI

The clearest difference is update cadence: HydrosenseAI at fortnightly against Vi Training's every 14 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.

Vi Training ships an update every 14 months, HydrosenseAI fortnightly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Vi Training | HydrosenseAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Fortnightly** |
| Size | 56 MB | 59 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vi Training Gym Ltd](https://appshunter.io/developer/1683168904) | [Innovosens](https://appshunter.io/developer/1550075388) |

## What reviewers say

### Vi Training

[App page](https://appshunter.io/ios/app/vi-training/id6447982269)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydrosenseAI

[App page](https://appshunter.io/ios/app/hydrosenseai/id6759246981)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vi Training free?

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

### Is HydrosenseAI free?

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

### Do Vi Training or HydrosenseAI have ads?

Neither Vi Training nor HydrosenseAI shows ads.

### Which is updated more often, Vi Training or HydrosenseAI?

Vi Training ships an update every 14 months, and HydrosenseAI fortnightly. Most recently, Vi Training was updated on October 27, 2026 and HydrosenseAI on October 28, 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.*