# Invoice Maker・Billing App vs Estimate Maker Flex

Invoice Maker・Billing App and Estimate Maker Flex both sit at 4.8 stars, but that hides the real split: 97% of Estimate Maker Flex's written reviews are positive against 56% of Invoice Maker・Billing App's. Estimate Maker Flex also leads on iOS requirement (13.0 vs 15.0). Invoice Maker・Billing App's advantage is ratings volume (7.2K vs 101) and chart position (#101 vs unranked). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Invoice Maker・Billing App sells 12 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 Invoice Maker・Billing App against 4.8 for Estimate Maker Flex. That said, the two scores are not equally well evidenced: Invoice Maker・Billing App has 7.2K ratings behind it against 101, so its average is the more settled of the two. Written reviews are what separate them: 56% of Invoice Maker・Billing App's written reviews are positive against 97% of Estimate Maker Flex's.

Invoice Maker・Billing App ships an update every 2 weeks, Estimate Maker Flex every 9 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Invoice Maker・Billing App | Estimate Maker Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (7.2K ratings)](https://appshunter.io/ios/app/invoice-makerbilling-app/id1447239633/reviews) | [4.8 (101 ratings)](https://appshunter.io/ios/app/estimate-maker-flex/id1594306406/reviews) |
| Number of ratings | **7.2K** | 101 |
| Positive reviews | 56.1% 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 | **#101** | — |
| Size | 301 MB | 99 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Saldo Apps Inc.](https://appshunter.io/developer/1277532073) | [B TO J PTY LTD](https://appshunter.io/developer/569308231) |

## What reviewers say

### Invoice Maker・Billing App

[App page](https://appshunter.io/ios/app/invoice-makerbilling-app/id1447239633)

**Currently charting:** #101 Top Grossing · Business (US App Store)

Create and share professional invoices and estimates quickly from any device. Save time on paperwork, stay organized, and get paid faster with customizable branding and payment options. Focus on your business while this app handles your billing.

**Highlights:** Create invoices and estimates quickly, Convert estimates to invoices, Save product/service details, Calculate taxes and discounts, Add payment methods, Customizable branding, Add signatures and photos

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $7.99 | per month |
| Weekly Premium Subscription | $7.99 | per 7 days |
| Weekly Premium Subscription | $7.99 | per 7 days |
| Saldo Apps Premium | $9.99 | per 7 days |
| Saldo Apps Premium | $11.99 | per 7 days |
| Saldo Apps Premium | $14.99 | per month |
| Invoice Maker PRO Monthly | $14.99 | per month |
| Invoice Maker PRO Monthly | $14.99 | per month |
| Monthly subscription | $14.99 | per month |
| Monthly Premium Subscription | $15.99 | per month |
| Annual Premium Subscription | $49.99 | per year |
| Saldo Apps Premium Yearly | $99.99 | per year |

**What reviewers like**

- 👍 User-friendly layout
- 🚀 Fast and efficient
- 📝 Professional-looking invoices
- 💰 Convenient payment options
- 📊 Helpful reporting and tracking features

**What reviewers complain about**

- 🐛 Occasional crashes and glitches
- 🔄 Issues with syncing and data loss
- 💰 Subscription model concerns
- 🕰️ Slow response times
- 🔒 Security and login problems

**Reported bugs**

- Invoices not sending properly
- Subscription issues and unexpected charges
- Data loss after app updates or device changes
- Compatibility problems with newer iOS versions
- Invoices showing as drafts unexpectedly

**Requested features**

- Add late fee feature
- Improve invoice customization options
- Integrate with inventory management systems
- Provide better customer support channels
- Offer a one-time purchase option


### 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 Invoice Maker・Billing App free?

Invoice Maker・Billing App 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, Invoice Maker・Billing App or Estimate Maker Flex?

Invoice Maker・Billing App and Estimate Maker Flex are both rated 4.8 out of 5 on the App Store, from 7.2K and 101 ratings respectively.

### Do Invoice Maker・Billing App or Estimate Maker Flex have ads?

Neither Invoice Maker・Billing App nor Estimate Maker Flex shows ads.

### Which is updated more often, Invoice Maker・Billing App or Estimate Maker Flex?

Invoice Maker・Billing App ships an update every 2 weeks, and Estimate Maker Flex every 9 days. Most recently, Invoice Maker・Billing App was updated on September 24, 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.*