# InstarVision for iPad vs HydroponicsCalc

The clearest difference is price: InstarVision for iPad at Free against HydroponicsCalc's $1.99. InstarVision for iPad also leads on update cadence (every 5 weeks vs every 4 months) and ratings volume (3 vs 1). HydroponicsCalc's advantage is rating (5.0 vs 2.7). On ads, in-app purchases and device support there is nothing between them.

InstarVision for iPad is free to download; HydroponicsCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HydroponicsCalc holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

InstarVision for iPad ships an update every 5 weeks, HydroponicsCalc every 4 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | InstarVision for iPad | HydroponicsCalc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/instarvision-for-ipad/id767539403/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydroponicscalc/id6775172331/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 81.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 154 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [INSTAR Deutschland GmbH](https://appshunter.io/developer/413109556) | [Douglas Stieber](https://appshunter.io/developer/6771586128) |

## What reviewers say

### InstarVision for iPad

[App page](https://appshunter.io/ios/app/instarvision-for-ipad/id767539403)

View and control your IP cameras from your iPad. Stream live video and audio, adjust settings, and manage recordings from various compatible brands.

**Highlights:** Live video/audio streaming, Add, edit, delete cameras, Pan/Tilt/Zoom control, Change camera settings, Save or share snapshots, Play cloud/SD card recordings, Motion detection activation

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

**In-app purchases:** none


### HydroponicsCalc

[App page](https://appshunter.io/ios/app/hydroponicscalc/id6775172331)

Manage your hydroponic garden with this comprehensive tool. Track reservoir levels, mix nutrients precisely, calculate pH and VPD, and document your grow with a journal and harvest log. Supports both US and metric units.

**Highlights:** Reservoir management dashboard, Concentrate and EC mixing calculators, pH and VPD calculators, Grow journal with photo timeline, Harvest log and ROI dashboard, Light schedule tracker, US & Metric unit support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is InstarVision for iPad free?

InstarVision for iPad is free to download, with no in-app purchases.

### Is HydroponicsCalc free?

HydroponicsCalc costs $1.99, with no in-app purchases.

### Which has better reviews, InstarVision for iPad or HydroponicsCalc?

HydroponicsCalc is rated higher. InstarVision for iPad averages 2.7 out of 5 from 3 ratings, while HydroponicsCalc averages 5.0 from 1 ratings.

### Do InstarVision for iPad or HydroponicsCalc have ads?

Neither InstarVision for iPad nor HydroponicsCalc shows ads.

### Which is updated more often, InstarVision for iPad or HydroponicsCalc?

InstarVision for iPad ships an update every 5 weeks, and HydroponicsCalc every 4 months. Most recently, InstarVision for iPad was updated on October 23, 2026 and HydroponicsCalc on October 23, 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.*