# Smart Invoice vs Maxhub Solar

The clearest difference is in-app purchases: Maxhub Solar at none against Smart Invoice's 2. Maxhub Solar also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Smart Invoice sells 2 in-app purchases, starting at $6.99 per 7 days. Maxhub Solar asks for nothing beyond the download.

Smart Invoice ships an update every 3 months, Maxhub Solar every 4 weeks. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Smart Invoice | Maxhub Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Size | 63 MB | 43 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CW Lee](https://appshunter.io/developer/1468639016) | [Guangzhou Shiyuan Electronics Co., Ltd.](https://appshunter.io/developer/542894088) |

## What reviewers say

### Smart Invoice

[App page](https://appshunter.io/ios/app/smart-invoice/id1516600182)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $6.99 | per 7 days |
| Annually Subscription | $69.99 | per year |


### Maxhub Solar

[App page](https://appshunter.io/ios/app/maxhub-solar/id6480428253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Invoice free?

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

### Is Maxhub Solar free?

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

### Do Smart Invoice or Maxhub Solar have ads?

Smart Invoice shows ads; Maxhub Solar does not.

### Which is updated more often, Smart Invoice or Maxhub Solar?

Smart Invoice ships an update every 3 months, and Maxhub Solar every 4 weeks. Most recently, Smart Invoice was updated on September 17, 2026 and Maxhub Solar on September 11, 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.*