# SCAN ACE · PDF Scanner App vs Invoice Maker・Estimate App

The clearest difference is ratings volume: SCAN ACE · PDF Scanner App at 39K against Invoice Maker・Estimate App's 201. SCAN ACE · PDF Scanner App also leads on review sentiment (87% vs 67%) and chart position (#179 vs unranked). Invoice Maker・Estimate App's advantage is update cadence (every 3 days vs fortnightly). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. SCAN ACE · PDF Scanner App sells 10 in-app purchases, starting at $2.99 per month and Invoice Maker・Estimate App sells 4 in-app purchases, starting at $5.99 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 — 4.8 for SCAN ACE · PDF Scanner App against 4.9 for Invoice Maker・Estimate App. That said, the two scores are not equally well evidenced: SCAN ACE · PDF Scanner App has 39K ratings behind it against 201, so its average is the more settled of the two. Written reviews are what separate them: 87% of SCAN ACE · PDF Scanner App's written reviews are positive against 67% of Invoice Maker・Estimate App's.

SCAN ACE · PDF Scanner App ships an update fortnightly, Invoice Maker・Estimate App every 3 days. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | SCAN ACE · PDF Scanner App | Invoice Maker・Estimate App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (39K ratings)](https://appshunter.io/ios/app/scan-ace-pdf-scanner-app/id556500145/reviews) | **[4.9 (201 ratings)](https://appshunter.io/ios/app/invoice-makerestimate-app/id6739814340/reviews)** |
| Number of ratings | **39K** | 201 |
| Positive reviews | **86.8% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Subscription | Subscription |
| Best chart rank | **#179** | — |
| Size | 126 MB | 18 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NEO PIXEL LABS PTE. LTD.](https://appshunter.io/developer/1788472183) | [Dynamic Falcon](https://appshunter.io/developer/1221926593) |

## What reviewers say

### SCAN ACE · PDF Scanner App

[App page](https://appshunter.io/ios/app/scan-ace-pdf-scanner-app/id556500145)

**Currently charting:** #179 Top Grossing · Business (US App Store)

Transform any document or image into a high-quality digital file. This app offers automatic edge detection, multiple scan modes, and advanced editing tools like OCR, filters, and watermarking. Securely manage, share, and convert your files with ease.

**Highlights:** Automatic document edge detection, Document, ID, and Passport scan modes, AI OCR for text recognition and copying, Professional editing filters, Add signatures and watermarks, Password protection for PDFs, Cloud storage integration

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan - Monthly | $2.99 | per month |
| Premium Plan - Weekly | $4.99 | per 7 days |
| Premium Plan - Weekly | $4.99 | per 7 days |
| Premium Plan - Weekly | $5.99 | per 7 days |
| Premium Plan - Monthly | $9.99 | per month |
| Premium Plan - Weekly | $9.99 | per 7 days |
| Premium Plan - Yearly | $19.99 | per year |
| Premium Plan - Yearly | $29.99 | per year |
| Premium Plan - Yearly | $29.99 | per year |
| Premium Plan - Yearly | $49.99 | per year |

**What reviewers like**

- 💻 Easy to use
- 🚀 Convenient for on-the-go scanning
- 📁 Effective for organizing and storing documents
- 🔍 Produces high-quality scans
- ⚙️ Useful features like color/grayscale options

**What reviewers complain about**

- 🐛 Issues with recent updates (e.g., lost folder organization, decreased functionality)
- 🔍 Quality concerns with some scans
- 🔒 Unreliable cloud storage integration (Dropbox, Google Drive)
- 💰 Frustration with subscription model after previous one-time purchase
- 🤔 Confusing or unintuitive user interface

**Reported bugs**

- Crashes or freezes during use
- Issues with batch scanning and document processing
- Problems with exporting or sharing scanned documents

**Requested features**

- Restore folder organization and management
- Improve cloud storage integration and sync
- Add more customization options for file naming and organization
- Enhance multi-page scanning and editing capabilities


### Invoice Maker・Estimate App

[App page](https://appshunter.io/ios/app/invoice-makerestimate-app/id6739814340)

Create, send, and manage professional invoices, estimates, and receipts effortlessly. Designed for freelancers and small businesses, this tool helps you get paid faster and stay organized on the go.

**Highlights:** Create professional invoices, Send estimates and receipts, Convert estimates to invoices, Track invoices and payments, Manage client information, Send invoices via email/text

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Estimates & Invoices Maker Weekly | $5.99 | per 7 days |
| Create Invoices On-site with trial | $5.99 | per 7 days |
| Create Invoice Templates Monthly | $9.99 | per month |
| Simple Invoices Generator Annually | $99.99 | per year |


## Frequently asked questions

### Is SCAN ACE · PDF Scanner App free?

SCAN ACE · PDF Scanner App is free to download, with in-app purchases available.

### Is Invoice Maker・Estimate App free?

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

### Which has better reviews, SCAN ACE · PDF Scanner App or Invoice Maker・Estimate App?

Invoice Maker・Estimate App is rated higher. SCAN ACE · PDF Scanner App averages 4.8 out of 5 from 39K ratings, while Invoice Maker・Estimate App averages 4.9 from 201 ratings.

### Do SCAN ACE · PDF Scanner App or Invoice Maker・Estimate App have ads?

Neither SCAN ACE · PDF Scanner App nor Invoice Maker・Estimate App shows ads.

### Which is updated more often, SCAN ACE · PDF Scanner App or Invoice Maker・Estimate App?

SCAN ACE · PDF Scanner App ships an update fortnightly, and Invoice Maker・Estimate App every 3 days. Most recently, SCAN ACE · PDF Scanner App was updated on October 24, 2026 and Invoice Maker・Estimate App on October 22, 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.*