# SmartDocs Library vs DueKind Invoice Follow Up

The clearest difference is iOS requirement: DueKind Invoice Follow Up at 13.0 against SmartDocs Library's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SmartDocs Library sells 9 in-app purchases, starting at $2.99 per month and DueKind Invoice Follow Up sells 1 in-app purchase, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | SmartDocs Library | DueKind Invoice Follow Up |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 17 MB | 36 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thies Harm Landsberger](https://appshunter.io/developer/1875279128) | [Aariz Rasheed](https://appshunter.io/developer/1825670646) |

## What reviewers say

### SmartDocs Library

[App page](https://appshunter.io/ios/app/smartdocs-library/id6760452990)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmartDocs Library Pro Monthly | $2.99 | per month |
| Smart Docs Library Pro Yearly | $17.99 | per year |
| Small Coffee | $1.99 | one-time |
| Medium Coffee | $3.99 | one-time |
| Large Coffee | $5.99 | one-time |
| Small Meal | $7.99 | one-time |
| Healthy Meal | $12.99 | one-time |
| 1kg Coffee | $22.99 | one-time |
| SmartDocs Pro | $49.99 | one-time |


### DueKind Invoice Follow Up

[App page](https://appshunter.io/ios/app/duekind-invoice-follow-up/id6781895520)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DueKind Pro Monthly | $5.99 | per month |


## Frequently asked questions

### Is SmartDocs Library free?

SmartDocs Library is free to download, with in-app purchases available.

### Is DueKind Invoice Follow Up free?

DueKind Invoice Follow Up is free to download, with in-app purchases available.

### Do SmartDocs Library or DueKind Invoice Follow Up have ads?

Neither SmartDocs Library nor DueKind Invoice Follow Up 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.*