# Billdu vs Estimate Maker Flex

The clearest difference is ratings volume: Billdu at 26K against Estimate Maker Flex's 101. Billdu also leads on chart position (#66 vs unranked). Estimate Maker Flex's advantage is iOS requirement (13.0 vs 17.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Billdu sells 10 in-app purchases, starting at $7.99 per month and Estimate Maker Flex sells 2 in-app purchases, starting at $5.99 per month. 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 Billdu against 4.8 for Estimate Maker Flex. That said, the two scores are not equally well evidenced: Billdu has 26K ratings behind it against 101, so its average is the more settled of the two. Written reviews are what separate them: 89% of Billdu's written reviews are positive against 97% of Estimate Maker Flex's.

Billdu ships an update every 2 weeks, Estimate Maker Flex every 9 days. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Billdu | Estimate Maker Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (26K ratings)](https://appshunter.io/ios/app/billdu-invoice-estimate-maker/id527885754/reviews) | [4.8 (101 ratings)](https://appshunter.io/ios/app/estimate-maker-flex/id1594306406/reviews) |
| Number of ratings | **26K** | 101 |
| Positive reviews | 89.3% of reviews | **97.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#66** | — |
| Size | 205 MB | 99 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [BILLDU LTD](https://appshunter.io/developer/501173313) | [B TO J PTY LTD](https://appshunter.io/developer/569308231) |

## What reviewers say

### Billdu

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

**Currently charting:** #66 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


### Estimate Maker Flex

[App page](https://appshunter.io/ios/app/estimate-maker-flex/id1594306406)

Create and send professional estimates quickly and easily. Convert estimates to invoices with a single tap. Customize titles, currencies, and date formats for a personalized touch. Works offline and supports multiple templates.

**Highlights:** Create and send estimates, Convert estimates to invoices, Customizable titles and subtitles, Multi-currency support, Multiple date formats, Offline functionality, Professional templates

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $5.99 | per month |
| 1 Year Subscription | $49.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient for creating estimates
- 👍 Practical and functional
- 👍 Professional-looking estimates
- 👍 Helpful for business growth

**What reviewers complain about**

- ❓ Translation not complete
- ❓ A little difficult to understand initially
- 🐛 App not opening

**Reported bugs**

- App not opening

**Requested features**

- Add option to get client signature
- Add signature of the person who made the estimate


## Frequently asked questions

### Is Billdu free?

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

### Is Estimate Maker Flex free?

Estimate Maker Flex is free to download, with in-app purchases available.

### Which has better reviews, Billdu or Estimate Maker Flex?

Billdu and Estimate Maker Flex are both rated 4.8 out of 5 on the App Store, from 26K and 101 ratings respectively.

### Do Billdu or Estimate Maker Flex have ads?

Neither Billdu nor Estimate Maker Flex shows ads.

### Which is updated more often, Billdu or Estimate Maker Flex?

Billdu ships an update every 2 weeks, and Estimate Maker Flex every 9 days. Most recently, Billdu was updated on September 25, 2026 and Estimate Maker Flex on September 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.*