# SLP Training Event vs Invoice Maker

The clearest difference is in-app purchases: SLP Training Event at none against Invoice Maker's 1. SLP Training Event also leads on ads (none vs shown) and device support (3 vs 1). Invoice Maker's advantage is update cadence (every 2 days vs every 27 months). On price there is nothing between them.

Both are free to download. Invoice Maker sells 1 in-app purchase, starting at $7.99 per 7 days. SLP Training Event asks for nothing beyond the download.

SLP Training Event ships an update every 27 months, Invoice Maker every 2 days. The most recent releases landed on October 20, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SLP Training Event | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Every 2 days** |
| Size | 3 MB | 11 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Stanley Black & Decker, Inc.](https://appshunter.io/developer/414050137) | [Space Node Co., Ltd.](https://appshunter.io/developer/475017562) |

## What reviewers say

### SLP Training Event

[App page](https://appshunter.io/ios/app/slp-training-event/id1623676207)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-invoice-dash/id6804103873)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $7.99 | per 7 days |


## Frequently asked questions

### Is SLP Training Event free?

SLP Training Event is free to download, with no in-app purchases.

### Is Invoice Maker free?

Invoice Maker is free to download, with in-app purchases available.

### Do SLP Training Event or Invoice Maker have ads?

Invoice Maker shows ads; SLP Training Event does not.

### Which is updated more often, SLP Training Event or Invoice Maker?

SLP Training Event ships an update every 27 months, and Invoice Maker every 2 days. Most recently, SLP Training Event was updated on October 20, 2026 and Invoice Maker on October 3, 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.*