Comparison

GanttMaster vs Invoice & Estimate Maker・Billo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GanttMaster

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
Read full description

Manage projects with your whole team. No extra cost for additional team members. Plan smarter. Track better. Collaborate faster with GanttMaster. GanttMaster is a powerful, easy-to-use project management app built for teams, freelancers, startups, and businesses of any size. Unlike many project management tools that charge for every additional team member, GanttMaster lets you collaborate without worrying about growing per-seat costs. And because projects don’t only happen at your desk, GanttMaster keeps your tasks, timelines, team, reminders, risks, and budgets with you wherever work happens. Project Management On the Go Manage projects from your phone or tablet wherever you are. Check today’s priorities, update tasks, review your Gantt timeline, collaborate with your team, and keep projects moving even when you’re away from your desk. Interactive Gantt Project Timeline Visualize your entire project with clear, dynamic Gantt charts. Track: • Tasks and subtasks • Project schedules • Milestones • Start and due dates • Task dependencies • Project progress GanttMaster supports major dependency types including Finish-to-Start, Start-to-Start, and Finish-to-Finish. Task & Subtask Management Create tasks and subtasks, set priorities, assign responsibilities, and track progress in real time. Keep both simple projects and complex workflows organized in one place. Today View, Daily Tasks & Reminders Stay focused on what matters today. Create personal daily tasks, review project tasks due today, and set reminders so important work doesn’t get forgotten. Team Collaboration Bring your team into one centralized workspace. • Assign tasks • Add comments • Share file links • Track updates • Organize teams and responsibilities Collaborate without adding extra cost for every project seat. Project Risk Management Identify and track project risks before they become bigger problems. Add risk categories, likelihood, impact, mitigation plans, owners, and due dates to keep your projects under control. Budget & Expense Tracking Keep project finances visible alongside your work. Set project budgets, record expenses, organize costs by category, and monitor remaining budget directly from your project. Real-Time Notifications Stay informed about important project activity including task updates, comments, assignments, deadlines, and reminders. Role-Based Access Organize project responsibilities with roles such as Project Manager, Team Manager, and User. Control how different team members participate in your projects. Project Templates Start new projects faster by reusing existing project structures. Templates can include tasks, subtasks, schedules, and project workflows, helping you reduce repetitive setup work and maintain consistency. Why Choose GanttMaster? GanttMaster combines the essential tools you need to plan and manage projects without unnecessary complexity. • No extra cost per project seat • Project management on the go • Interactive Gantt charts • Task and subtask management • Daily planning and reminders • Team collaboration • Risk management • Budget and expense tracking • Project templates • Real-time notifications Whether you’re managing a startup, a client project, a remote team, or your own business, GanttMaster helps you keep everyone aligned and every project moving forward. Your projects. Your whole team. Wherever work happens. Start managing projects smarter with GanttMaster. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ganttmaster.com/privacy.html

About

Invoice & Estimate Maker・Billo

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
Read full description

Billo is the fastest and easiest way to create professional invoices and estimates right from your phone. Designed for contractors, freelancers, tradespeople, and small business owners, this lightweight invoice maker helps you stay organized and get paid faster — no stress, no paperwork. Whether you're at a job site, meeting a client, or working from home, Billo makes it simple to send invoices or estimates in seconds. It’s an intuitive invoice creator that saves time and helps you look professional with minimal effort. Key Features: Create and send invoices in seconds Generate accurate estimates for your clients Convert estimates into invoices with one tap Share as PDF via email, message, or print Track paid and unpaid invoices easily Manage your client list in one place Add custom notes, taxes, and discounts All data stored securely on your device Made for People Who Work for Themselves Billo was built for self-employed professionals: electricians, handymen, cleaners, designers, photographers, consultants, mechanics, landscapers, and more. If you need a reliable invoice generator or estimate maker on the go, Billo is for you. Why Billo? Because invoicing shouldn’t be hard. With Billo, there’s no learning curve — just a smooth, fast experience that works from day one. Whether you need a single invoice or send dozens a month, this invoice creator adapts to your workflow. What users love: - Super clean and easy to use - Helps get paid faster - Ideal for mobile invoicing - Always ready — even offline If you're looking for a simple invoice maker that actually saves you time, try Billo today. Available Subscriptions: 1-week invoice subscription 1-month invoice subscription 1-year invoice subscription Subscriptions auto-renew 24 hours before the expiration date. You can manage your subscriptions in account Settings on the App Store. Privacy Policy: https://www.notion.so/Privacy-Policy-21aa0f5ed8d080348288cc3acc8f029f?source=copy_link Terms Of Use: https://www.notion.so/Terms-Condition-21aa0f5ed8d080afb636f2cb425a2282?source=copy_link

Screenshots

GanttMaster4 screens
Invoice & Estimate Maker・Billo4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
GanttMaster versus Invoice & Estimate Maker・Billo: the parameters behind the verdict, then further details
ParameterGanttMasterInvoice & Estimate Maker・Billo
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyWeekly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.6
Further details — not scored
Size48 MB46 MB
Age rating4+4+
DeveloperMeva Aise OnyurtANDREI KUCHUR

Customer experience

GanttMaster

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Invoice & Estimate Maker・Billo

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

GanttMaster

Subscriptions2
  • Monthly Subscription7 Days trial$5.991 Month
  • Premium Annual7 Days trial$34.991 Year
3 purchases

Invoice & Estimate Maker・Billo

Subscriptions3
  • Unlimited Access3 Days trial$5.997 Days
  • Unlimited Access$9.991 Month
  • Unlimited Access$99.991 Year

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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