IML Tree Motion vs ArboRefD
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
IML Tree Motion
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This App is used to control the PiCUS Tree Motion Sensor 3 (PTMS 3) from IML Electronic. The main function of this application is to start and stop the measurements of the PTMS 3 with the correct configuration. Bluetooth 4/5 is used for communication as the PTMS 3 are completely sealed to protect them from dust and water. It is also beneficial to have location tracking enabled on the mobile device to tell the PTMS 3 the actual geographical position and direction at the start of the measurement.
ArboRefD
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: IML Tree Motion at none against ArboRefD's 8. IML Tree Motion also leads on iOS requirement (12.2 vs 15.6). ArboRefD's advantage is update cadence (every 4 weeks vs every 4 months). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. ArboRefD sells 8 one-off in-app purchases. IML Tree Motion asks for nothing beyond the download.
IML Tree Motion ships an update every 4 months, ArboRefD every 4 weeks. The most recent releases landed on July 23, 2026 and September 22, 2026 respectively.
| Parameter | IML Tree Motion | ArboRefD |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 4 weeks β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac β better |
| Requires iOS | 12.2 β better | 15.6 |
| Further details β not scored | ||
| Size | 92 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | IML Instrumenta Mechanik Labor Electronic GmbH | Frank Rinn |
In-app purchases
IML Tree Motion
No in-app purchases
ArboRefD
- 1 Day$0.99
- 1-Day-Pass$0.99
- 1-Week-Pass$4.99
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- Full version (Week)$5.99
- Full version (Month)$11.99
- 1-Month-Pass$12.99
- Full version (Year)$49.99
- 1-Year-Pass$59.99








