# PrebillViewer vs AdOnAir

The clearest difference is update cadence: AdOnAir at monthly against PrebillViewer's every 18 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.

PrebillViewer ships an update every 18 months, AdOnAir monthly. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PrebillViewer | AdOnAir |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Size | 78 MB | 111 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BigHand](https://appshunter.io/developer/363744436) | [Agile Zone LLC](https://appshunter.io/developer/1698169225) |

## What reviewers say

### PrebillViewer

[App page](https://appshunter.io/ios/app/prebillviewer/id6648793584)

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

**In-app purchases:** none


### AdOnAir

[App page](https://appshunter.io/ios/app/adonair/id6742056100)

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

**In-app purchases:** none


## Frequently asked questions

### Is PrebillViewer free?

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

### Is AdOnAir free?

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

### Do PrebillViewer or AdOnAir have ads?

Neither PrebillViewer nor AdOnAir shows ads.

### Which is updated more often, PrebillViewer or AdOnAir?

PrebillViewer ships an update every 18 months, and AdOnAir monthly. Most recently, PrebillViewer was updated on October 8, 2026 and AdOnAir 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.*