# Operational Amplifiers Guide vs Nodes AI

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against Nodes AI's 3. Operational Amplifiers Guide also leads on iOS requirement (16.0 vs 18.0). Nodes AI's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Nodes AI sells 3 one-off in-app purchases. Operational Amplifiers Guide asks for nothing beyond the download.

## The numbers

| Metric | Operational Amplifiers Guide | Nodes AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Size | 17 MB | 8 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Nikolaos Psarakis](https://appshunter.io/developer/1513748367) |

## What reviewers say

### Operational Amplifiers Guide

[App page](https://appshunter.io/ios/app/operational-amplifiers-guide/id6467499897)

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

**In-app purchases:** none


### Nodes AI

[App page](https://appshunter.io/ios/app/nodes-ai/id6765920186)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Tokens | $1.99 | one-time |
| 1000 Tokens | $2.99 | one-time |
| 5000 Tokens | $7.99 | one-time |


## Frequently asked questions

### Is Operational Amplifiers Guide free?

Operational Amplifiers Guide is free to download, with no in-app purchases.

### Is Nodes AI free?

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

### Do Operational Amplifiers Guide or Nodes AI have ads?

Operational Amplifiers Guide shows ads; Nodes AI does not.

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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.*