---
title: "Time Master + Billing — App Overview"
url: https://marlvel.ai/intel-report/business/com-oncore-timemaster
category: Business
developer: On-Core Software LLC
platforms: ios, android
rating: 4.7 (41.6K ratings)
pricing: free
report_level: overview
generated: 2026-04-14
---

<!-- SECTION: Key Insight -->
> **Key Insight:** A highly-rated, robust time-tracking utility that offers professional-grade billing flexibility for independent workers and law firms.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Business |
| Rating | 4.7 ★ (41.6K) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 6.5.3 |
| Latest Version (Android) | 2025.2.26 |
| Developer | On-Core Software LLC |

<!-- SECTION: Summary -->
## What is Time Master + Billing?

Time Master + Billing is a comprehensive time and expense tracking application designed for professionals who require flexible, multi-layered billing capabilities. Developed by On-Core Software LLC, the app supports complex workflows including multiple concurrent timers and hierarchical project categorization. It is notable for its ability to maintain background timers and its high volume of user feedback.

<!-- SECTION: Key Features -->
## Key Features

- **Flexible Time Tracking**: Track time using start/stop functionality, duration entry, or punch-in/out sessions.
- **Concurrent Timers**: Manage single or multiple running timers that continue to operate even when the app is closed.
- **Hierarchical Organization**: Categorize time entries by client, project, and specific tasks for detailed reporting.
- **Customizable Billing Rates**: Define powerful, flexible billing rates tailored to specific professional requirements.

<!-- SECTION: Target Audience -->
## Who is it for?

Independent consultants, attorneys, and contractors who need to track billable time and expenses across various projects and tasks.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/time-master-billing/id310289408?uo=2)
- [Google Play](https://play.google.com/store/apps/details?id=com.firefog.timemaster&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/intel-report/business/com-oncore-timemaster)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/intel-report/business/com-oncore-timemaster).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*