# Billdu vs Invoice Simple App

The clearest difference is ads: Billdu at none against Invoice Simple App's shown. Billdu also leads on ratings volume (26K vs 1) and chart position (#75 vs unranked). Invoice Simple App's advantage is rating (5.0 vs 4.8) and review sentiment (100% vs 89%). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Billdu sells 10 in-app purchases, starting at $7.99 per month and Invoice Simple App sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Invoice Simple App holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Billdu has 26K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 89% of Billdu's written reviews are positive against 100% of Invoice Simple App's.

Billdu ships an update every 2 weeks, Invoice Simple App every 4 weeks. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Billdu | Invoice Simple App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (26K ratings)](https://appshunter.io/ios/app/billdu-invoice-estimate-maker/id527885754/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/invoice-simple-app/id6479690982/reviews)** |
| Number of ratings | **26K** | 1 |
| Positive reviews | 89.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#75** | — |
| Size | 205 MB | 85 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BILLDU LTD](https://appshunter.io/developer/501173313) | [Caprinix LLC](https://appshunter.io/developer/1530884900) |

## What reviewers say

### Billdu

[App page](https://appshunter.io/ios/app/billdu-invoice-estimate-maker/id527885754)

**Currently charting:** #75 Top Grossing · Business (US App Store)

Create professional invoices and estimates quickly for your small business. This app helps you get paid faster with online payment options, track expenses by scanning receipts, and manage clients and inventory. It's designed for freelancers and contractors to maintain a professional image and streamline billing.

**Highlights:** Customizable invoice templates, Instant estimates and invoices, Online payment processing, Receipt scanning for expense tracking, Client and inventory management, Multi-device synchronization

**Features:** Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LITE - 1 month | $7.99 | per month |
| STANDARD (Month) | $14.99 | per month |
| STANDARD - 1 month | $14.99 | per month |
| STANDARD - 1 month | $14.99 | per month |
| PREMIUM (Month) | $27.99 | per month |
| PREMIUM - 1 month | $27.99 | per month |
| 24 invoices | $59.99 | per year |
| STARTER (Year) | $59.99 | per year |
| STANDARD (Year) | $119.99 | per year |
| STANDARD - 12 months | $119.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 📊 Helpful business features
- 🖼️ Professional-looking invoices
- 🕰️ Time-saving
- 💻 Seamless mobile experience

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔍 Limited customization options
- 💳 Billing/payment issues
- 🕰️ Slow customer support response

**Reported bugs**

- Invoices not being received by clients
- Inconsistent invoice numbering
- Inability to save draft estimates

**Requested features**

- Improved date/time handling
- Ability to transfer data between businesses
- More customization options for invoices
- Integrated payment processing
- Enhanced reporting and analytics


### Invoice Simple App

[App page](https://appshunter.io/ios/app/invoice-simple-app/id6479690982)

Easily create and customize professional invoices, estimates, and receipts. Automatically generate documents from estimates with a single tap. Supports custom templates, company logos, and payment terms for efficient billing.

**Highlights:** Customizable invoice templates, Generate PDF invoices and estimates, Add company logo, Include payment terms, Create receipts, Discount and tax options, Client setup from contacts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features per week | $5.99 | per 7 days |
| Manage All Invoices Per Year | $49.99 | per year |
| Auto-manage & dispatch invoice | $69.99 | one-time |


## Frequently asked questions

### Is Billdu free?

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

### Is Invoice Simple App free?

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

### Which has better reviews, Billdu or Invoice Simple App?

Invoice Simple App is rated higher. Billdu averages 4.8 out of 5 from 26K ratings, while Invoice Simple App averages 5.0 from 1 ratings.

### Do Billdu or Invoice Simple App have ads?

Invoice Simple App shows ads; Billdu does not.

### Which is updated more often, Billdu or Invoice Simple App?

Billdu ships an update every 2 weeks, and Invoice Simple App every 4 weeks. Most recently, Billdu was updated on September 24, 2026 and Invoice Simple App on September 10, 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.*