---
title: "Joseph Sinfield — Publisher Intelligence"
type: publisher
publisher: "Joseph Sinfield"
publisher_slug: "joseph-sinfield"
canonical_url: "https://marlvel.ai/publishers/joseph-sinfield"
last_updated: 2026-05-26T01:12:42.627Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Joseph Sinfield Publisher Intelligence"
---
# Joseph Sinfield — Publisher Intelligence

> Joseph Sinfield publishes 1 app tracked by Marlvel.ai. Average rating: 3.83/5. Combined reviews: 6+.

- **Publisher:** Joseph Sinfield
- **Website:** [https://youtu.be/lgVDFKpVCYs](https://youtu.be/lgVDFKpVCYs)
- **Apps Tracked:** 1
- **Total Reviews:** 6
- **Average Rating:** 3.83/5
- **Categories:** Education
- **License:** CC-BY-NC 4.0

## Apps by Joseph Sinfield

| App | Category | Rating | Reviews | Sentiment |
| :--- | :--- | :--- | :--- | :--- |
| [Harp Guru](https://marlvel.ai/apps/harp-guru) | Education | 3.83/5 | 6 | — |

## Frequently Asked Questions

**Q: What apps does Joseph Sinfield make?**
A: Joseph Sinfield publishes Harp Guru.

**Q: Are Joseph Sinfield's apps good in 2026?**
A: Joseph Sinfield's apps have an average rating of 3.83/5 across 6 reviews.

---
© 2026 Marlvel.ai | [Full publisher profile](https://marlvel.ai/publishers/joseph-sinfield) | [All categories](https://marlvel.ai/api/llm/categories) | [Index](https://marlvel.ai/llms.txt)
Data licensed under CC-BY-NC 4.0.