# GanttMaster vs Invoice & Estimate Maker・Billo

The clearest difference is ads: Invoice & Estimate Maker・Billo at none against GanttMaster's shown. GanttMaster's advantage is update cadence (weekly vs every 2 months) and device support (3 vs 1). On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. GanttMaster sells 2 in-app purchases, starting at $5.99 per month and Invoice & Estimate Maker・Billo sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

GanttMaster ships an update weekly, Invoice & Estimate Maker・Billo every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | GanttMaster | Invoice & Estimate Maker・Billo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/invoice-and-estimate-makerbillo/id6747099315/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 48 MB | 46 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Meva Aise Onyurt](https://appshunter.io/developer/1813218364) | [ANDREI KUCHUR](https://appshunter.io/developer/1636476420) |

## What reviewers say

### GanttMaster

[App page](https://appshunter.io/ios/app/ganttmaster-project-manager/id6745624000)

This tool helps teams and individuals plan, track, and collaborate on projects. Visualize timelines with Gantt charts, manage tasks, and gain insights with detailed reports. Ideal for remote teams and businesses of all sizes.

**Highlights:** Task and subtask management, Interactive Gantt project timeline, Team collaboration tools, Mobile-friendly project management, Real-time notifications, Role-based access control, Detailed reports and insights, Advanced task dependencies

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Premium Annual | $34.99 | per year |


### Invoice & Estimate Maker・Billo

[App page](https://appshunter.io/ios/app/invoice-and-estimate-makerbillo/id6747099315)

Create professional invoices and estimates quickly from your phone. This app helps freelancers and small business owners manage billing, track payments, and get paid faster with a simple, intuitive interface. It's designed for on-the-go use, even offline.

**Highlights:** Create and send invoices in seconds, Generate accurate estimates, Convert estimates to invoices, Share PDFs via email or print, Track paid/unpaid invoices, Manage client list, Add custom notes, taxes, discounts

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $5.99 | per 7 days |
| Unlimited Access | $9.99 | per month |
| Unlimited Access | $99.99 | per year |


## Frequently asked questions

### Is GanttMaster free?

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

### Is Invoice & Estimate Maker・Billo free?

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

### Do GanttMaster or Invoice & Estimate Maker・Billo have ads?

GanttMaster shows ads; Invoice & Estimate Maker・Billo does not.

### Which is updated more often, GanttMaster or Invoice & Estimate Maker・Billo?

GanttMaster ships an update weekly, and Invoice & Estimate Maker・Billo every 2 months. Most recently, GanttMaster was updated on October 30, 2026 and Invoice & Estimate Maker・Billo on October 30, 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.*