# ArboRefD

> ArboRefD (iPhone/iPad app by Frank Rinn.)

- Source: https://appshunter.io/ios/app/arborefd/id6749804200 (this page in markdown: same URL + `.md`)
- Developer: [Frank Rinn](https://appshunter.io/developer/1832196562)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.6 · 58 MB
- Languages: American English
- Released: 2025-10-22
- Data updated: 2026-06-06
- User reviews in markdown: https://appshunter.io/ios/app/arborefd/id6749804200/reviews.md

## What is ArboRefD?

ArboRefD helps evaluating the breakage safety of trees with localized defects whose trunk still has an intact cross-section higher up. This is one of the practical applications of Allometric Self-Referencing (ASR) for evaluating the breakage and uprooting safety of defective mature trees.
To document the results for a specific tree, we recommend saving a screenshot after entering all data in the current version.
Additional features are currently being developed for the app.
If you buy the app with a one-time purchase and enclose the corresponding app invoice with your next order of a measuring device (ABT, DNT, RES) from RINNTECH, you will receive a discount.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 1-Week-Pass | $4.99 | one-time |
| 1 Day | $0.99 | one-time |
| Full version (Month) | $11.99 | one-time |
| Full version (Week) | $5.99 | one-time |
| Full version (Year) | $49.99 | one-time |
| 1-Day-Pass | $0.99 | one-time |
| 1-Month-Pass | $12.99 | one-time |
| 1-Year-Pass | $59.99 | one-time |



## Version history (last 3 releases)

### 1.0.32 — 2025-12-13

Improvement of In App Purchase error handling

### 1.0.25 — 2025-12-10

In-App-Purchases were fixed.

### 1.0.0 — 2025-10-23

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-06.*