# Operant BH vs OTonline

The clearest difference is update cadence: Operant BH at every 2 months against OTonline's every 6 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.

Operant BH ships an update every 2 months, OTonline every 6 months. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Operant BH | OTonline |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 25 MB | 104 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Operant Systems Inc.](https://appshunter.io/developer/598392258) | [neuroOT](https://appshunter.io/developer/1841346857) |

## What reviewers say

### Operant BH

[App page](https://appshunter.io/ios/app/operant-bh/id6502954928)

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

**In-app purchases:** none


### OTonline

[App page](https://appshunter.io/ios/app/otonline/id6752854989)

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

**In-app purchases:** none


## Frequently asked questions

### Is Operant BH free?

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

### Is OTonline free?

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

### Do Operant BH or OTonline have ads?

Neither Operant BH nor OTonline shows ads.

### Which is updated more often, Operant BH or OTonline?

Operant BH ships an update every 2 months, and OTonline every 6 months. Most recently, Operant BH was updated on November 4, 2026 and OTonline on October 25, 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.*