# Invoice Maker ▸ Invoice Simple vs Estimate Maker Flex

Invoice Maker ▸ Invoice Simple and Estimate Maker Flex both sit at 4.9 stars, but that hides the real split: 97% of Estimate Maker Flex's written reviews are positive against 64% of Invoice Maker ▸ Invoice Simple's. Estimate Maker Flex also leads on iOS requirement (13.0 vs 15.1). Invoice Maker ▸ Invoice Simple's advantage is ratings volume (123K vs 101) and chart position (#9 vs unranked). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Invoice Maker ▸ Invoice Simple sells 9 in-app purchases, starting at $6.99 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 — 4.9 for Invoice Maker ▸ Invoice Simple against 4.8 for Estimate Maker Flex. That said, the two scores are not equally well evidenced: Invoice Maker ▸ Invoice Simple has 123K ratings behind it against 101, so its average is the more settled of the two. Written reviews are what separate them: 64% of Invoice Maker ▸ Invoice Simple's written reviews are positive against 97% of Estimate Maker Flex's.

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Invoice Maker ▸ Invoice Simple | Estimate Maker Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (123K ratings)](https://appshunter.io/ios/app/invoice-maker-invoice-simple/id694831622/reviews)** | [4.8 (101 ratings)](https://appshunter.io/ios/app/estimate-maker-flex/id1594306406/reviews) |
| Number of ratings | **123K** | 101 |
| Positive reviews | 63.9% of reviews | **97.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | Every 9 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#9** | — |
| Size | 209 MB | 99 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Zenvoice Inc.](https://appshunter.io/developer/990870994) | [B TO J PTY LTD](https://appshunter.io/developer/569308231) |

## What reviewers say

### Invoice Maker ▸ Invoice Simple

[App page](https://appshunter.io/ios/app/invoice-maker-invoice-simple/id694831622)

**Currently charting:** #9 Top Grossing · Business, #191 Top Grossing (US App Store)

Create and send professional invoices, estimates, and receipts quickly from your mobile device. This app helps individuals and growing businesses get organized, look professional, and get paid faster by accepting online payments.

**Highlights:** Create invoices, estimates, and receipts, Send documents via email, text, or WhatsApp, Accept online payments, Customize invoices with logo and business details, Track invoice status and get payment reminders, Organize client and product information

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Essentials Monthly | $6.99 | per month |
| Mobile subscription | $10.99 | per month |
| Monthly Side Business | $10.99 | per month |
| Monthly Business Sub | $11.99 | per month |
| Monthly Subscription | $11.99 | per month |
| Monthly subscription | $13.49 | per month |
| Plus Monthly | $14.99 | per month |
| Monthly Standard Subscription | $17.99 | per month |
| Premium Monthly | $21.99 | per month |

**What reviewers like**

- 🚀 Easy to use
- 👍 Professional-looking invoices
- 🚀 Quick and simple
- 👍 Saves time
- 👍 Convenient mobile access

**What reviewers complain about**

- 💰 Expensive subscription
- 🐛 Glitches and bugs
- 🔀 Inconsistent features across platforms
- 🔀 Confusing navigation
- 🔀 Limited customization options

**Reported bugs**

- Invoices not sending properly
- App crashing or freezing
- Inability to recover deleted invoices
- Syncing issues between mobile and desktop

**Requested features**

- Add ability to rearrange line items
- Improve search and filtering capabilities
- Integrate with accounting software
- Add option to track expenses and profitability
- Allow multiple business profiles in one account


### 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 ▸ Invoice Simple free?

Invoice Maker ▸ Invoice Simple 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 ▸ Invoice Simple or Estimate Maker Flex?

Invoice Maker ▸ Invoice Simple is rated higher. Invoice Maker ▸ Invoice Simple averages 4.9 out of 5 from 123K ratings, while Estimate Maker Flex averages 4.8 from 101 ratings.

### Do Invoice Maker ▸ Invoice Simple or Estimate Maker Flex have ads?

Neither Invoice Maker ▸ Invoice Simple nor Estimate Maker Flex shows ads.

### Which is updated more often, Invoice Maker ▸ Invoice Simple or Estimate Maker Flex?

Invoice Maker ▸ Invoice Simple ships an update every 9 days, and Estimate Maker Flex every 9 days. Most recently, Invoice Maker ▸ Invoice Simple 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.*