# BuyBy vs Authenticator & Notes

The clearest difference is in-app purchases: BuyBy at none against Authenticator & Notes's 3. Authenticator & Notes's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Authenticator & Notes sells 3 in-app purchases, starting at $1.99 per month. BuyBy asks for nothing beyond the download.

## The numbers

| Metric | BuyBy | Authenticator & Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 1 MB | 71 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Celia Vieira](https://appshunter.io/developer/1842699193) | [Luiz Antonio Rosa Cardoso](https://appshunter.io/developer/1815372392) |

## What reviewers say

### BuyBy

[App page](https://appshunter.io/ios/app/buyby/id6756079970)

**Features:** macOS Compatibility

**In-app purchases:** none


### Authenticator & Notes

[App page](https://appshunter.io/ios/app/authenticator-and-notes-lockat/id6761867295)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lockat Pro Monthly | $1.99 | per month |
| Lockat Pro Yearly | $19.99 | per year |
| Lockat Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is BuyBy free?

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

### Is Authenticator & Notes free?

Authenticator & Notes is free to download, with in-app purchases available.

### Do BuyBy or Authenticator & Notes have ads?

Neither BuyBy nor Authenticator & Notes shows ads.

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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.*