# Defi training by SCHILLER vs IV solution calculator

The clearest difference is price: Defi training by SCHILLER at Free against IV solution calculator's $1.99. IV solution calculator's advantage is update cadence (every 6 months vs every 35 months) and iOS requirement (11.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Defi training by SCHILLER is free to download; IV solution calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Defi training by SCHILLER ships an update every 35 months, IV solution calculator every 6 months. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Defi training by SCHILLER | IV solution calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 6 months** |
| Size | 37 MB | 9 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [SCHILLER Médical](https://appshunter.io/developer/1508112580) | [Rimon](https://appshunter.io/developer/590338647) |

## What reviewers say

### Defi training by SCHILLER

[App page](https://appshunter.io/ios/app/defi-training-by-schiller/id1508112581)

**In-app purchases:** none


### IV solution calculator

[App page](https://appshunter.io/ios/app/iv-solution-calculator/id6471848937)

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

**In-app purchases:** none


## Frequently asked questions

### Is Defi training by SCHILLER free?

Defi training by SCHILLER is free to download, with no in-app purchases.

### Is IV solution calculator free?

IV solution calculator costs $1.99, with no in-app purchases.

### Do Defi training by SCHILLER or IV solution calculator have ads?

Neither Defi training by SCHILLER nor IV solution calculator shows ads.

### Which is updated more often, Defi training by SCHILLER or IV solution calculator?

Defi training by SCHILLER ships an update every 35 months, and IV solution calculator every 6 months. Most recently, Defi training by SCHILLER was updated on October 27, 2026 and IV solution calculator on October 12, 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.*