# Smart Invoice vs Fax

The clearest difference is monetization model: Smart Invoice at free with in-app purchases against Fax's subscription. Fax's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Smart Invoice sells 3 in-app purchases, starting at $4.99 per 7 days and Fax sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fax holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 12 and 5 respectively.

Smart Invoice ships an update every 4 months, Fax every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Smart Invoice | Fax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (12 ratings)](https://appshunter.io/ios/app/smart-invoice-estimate-maker/id6464425415/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/fax-send-doc-fast-from-iphone/id6740480854/reviews)** |
| Number of ratings | **12** | 5 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 14 MB | 36 MB |
| Requires iOS | 16.0 | **13.4** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bohdan Matviichuk](https://appshunter.io/developer/1699256806) | [EvenEdge](https://appshunter.io/developer/1714810723) |

## What reviewers say

### Smart Invoice

[App page](https://appshunter.io/ios/app/smart-invoice-estimate-maker/id6464425415)

Effortlessly create, manage, and track professional invoices and estimates. Streamline your business finances with multi-currency support and instant delivery options. Gain insights into your financial performance and simplify client billing.

**Highlights:** Create professional invoices, Manage and track invoices, Send invoices instantly, Multi-currency support, Customizable templates, Financial performance insights

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $14.99 | per month |


### Fax

[App page](https://appshunter.io/ios/app/fax-send-doc-fast-from-iphone/id6740480854)

Send faxes securely and quickly from your smartphone or tablet. This HIPAA-compliant app encrypts your documents for safe transmission, ideal for sensitive files. Get instant delivery notifications and an organized archive of sent faxes.

**Highlights:** Secure fax transmission, HIPAA compliant, Instant delivery notifications, In-app archive, Scan documents with camera, Cloud storage integration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $7.99 | per 7 days |
| 1 Month | $19.99 | per month |
| 1 Year | $79.99 | per year |


## Frequently asked questions

### Is Smart Invoice free?

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

### Is Fax free?

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

### Which has better reviews, Smart Invoice or Fax?

Fax is rated higher. Smart Invoice averages 4.8 out of 5 from 12 ratings, while Fax averages 5.0 from 5 ratings.

### Do Smart Invoice or Fax have ads?

Smart Invoice shows ads; Fax does not.

### Which is updated more often, Smart Invoice or Fax?

Smart Invoice ships an update every 4 months, and Fax every 3 weeks. Most recently, Smart Invoice was updated on November 3, 2026 and Fax on October 30, 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.*