# OPNTerm vs Watching Ducks on the Clock

The clearest difference is ads: OPNTerm at none against Watching Ducks on the Clock's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | OPNTerm | Watching Ducks on the Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | — |
| Size | 2 MB | 185 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [OPTOELECTRONICS Co.,Ltd.](https://appshunter.io/developer/556827248) | [Hideki Suehiro](https://appshunter.io/developer/510029069) |

## What reviewers say

### OPNTerm

[App page](https://appshunter.io/ios/app/opnterm/id556827245)

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

**In-app purchases:** none


### Watching Ducks on the Clock

[App page](https://appshunter.io/ios/app/watching-ducks-on-the-clock/id6759907069)

**In-app purchases:** none


## Frequently asked questions

### Is OPNTerm free?

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

### Is Watching Ducks on the Clock free?

Watching Ducks on the Clock is free to download, with no in-app purchases.

### Do OPNTerm or Watching Ducks on the Clock have ads?

Watching Ducks on the Clock shows ads; OPNTerm 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.*