# Invoice Maker + Estimates App vs Sign Documents & Doc Scanner

The clearest difference is monetization model: Sign Documents & Doc Scanner at free with in-app purchases against Invoice Maker + Estimates App's subscription. Sign Documents & Doc Scanner also leads on iOS requirement (16.0 vs 18.5). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Invoice Maker + Estimates App sells 3 in-app purchases, starting at $4.99 per 7 days and Sign Documents & Doc Scanner sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Invoice Maker + Estimates App against 4.9 for Sign Documents & Doc Scanner. Both are backed by a comparable volume of ratings — 16 and 7 respectively.

Invoice Maker + Estimates App ships an update every 3 days, Sign Documents & Doc Scanner every 2 days. The most recent releases landed on August 30, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Invoice Maker + Estimates App | Sign Documents & Doc Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (16 ratings)](https://appshunter.io/ios/app/invoice-maker-plus-estimates-app/id6749829993/reviews)** | [4.9 (7 ratings)](https://appshunter.io/ios/app/sign-documents-and-doc-scanner/id6752650359/reviews) |
| Number of ratings | **16** | 7 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 51 MB | 20 MB |
| Requires iOS | 18.5 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Revaz Khatiashvili](https://appshunter.io/developer/1806404373) | [Chan Tai](https://appshunter.io/developer/1851399897) |

## What reviewers say

### Invoice Maker + Estimates App

[App page](https://appshunter.io/ios/app/invoice-maker-plus-estimates-app/id6749829993)

This app helps freelancers and small businesses create professional invoices and estimates quickly. It offers customizable templates, expense tracking, client management, and automatic payment reminders to streamline billing and improve cash flow.

**Highlights:** Create professional invoices, Generate detailed estimates and quotes, Track expenses and attach receipts, Manage clients with a centralized database, Schedule automatic payment reminders, Multi-currency support for international clients, Cloud storage and synchronization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Invoice Maker - PRO | $4.99 | per 7 days |
| Monthly Invoice Maker - PRO | $9.99 | per month |
| Yearly Invoice Maker - PRO | $29.99 | per year |


### Sign Documents & Doc Scanner

[App page](https://appshunter.io/ios/app/sign-documents-and-doc-scanner/id6752650359)

Streamline document management with powerful PDF tools and electronic signature capabilities. Sign contracts, edit PDFs, scan documents, and secure sensitive information on the go. Transform your workflow and eliminate paper-based processes.

**Highlights:** Legally-binding electronic signatures, Advanced PDF editing, High-quality document scanning, PDF to Office format conversion, Password protection and biometric locking, Intelligent form filling

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sign Documents Weekly Sale | $4.99 | per 7 days |
| Sign Documents Weekly | $6.99 | per 7 days |
| Sign Documents Monthly | $17.99 | per month |


## Frequently asked questions

### Is Invoice Maker + Estimates App free?

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

### Is Sign Documents & Doc Scanner free?

Sign Documents & Doc Scanner is free to download, with in-app purchases available.

### Which has better reviews, Invoice Maker + Estimates App or Sign Documents & Doc Scanner?

Invoice Maker + Estimates App is rated higher. Invoice Maker + Estimates App averages 5.0 out of 5 from 16 ratings, while Sign Documents & Doc Scanner averages 4.9 from 7 ratings.

### Do Invoice Maker + Estimates App or Sign Documents & Doc Scanner have ads?

Neither Invoice Maker + Estimates App nor Sign Documents & Doc Scanner shows ads.

### Which is updated more often, Invoice Maker + Estimates App or Sign Documents & Doc Scanner?

Invoice Maker + Estimates App ships an update every 3 days, and Sign Documents & Doc Scanner every 2 days. Most recently, Invoice Maker + Estimates App was updated on August 30, 2026 and Sign Documents & Doc Scanner on September 8, 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.*