MRTN Rate Calculator vs Working Trees App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MRTN Rate Calculator
This utility calculates the optimal nitrogen fertilizer rate for crops based on agronomic research and current economic conditions. It provides a customized recommendation to maximize returns.
- Customized nitrogen rate recommendations
- Combines agronomic research
- Considers economic fluctuations
- Maximizes return on investment
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The Maximum Return To Nitrogen (MRTN) calculations combine the agronomics of nitrogen rate research and the realities of economic fluctuations to provide a customized nitrogen rate.
Working Trees App
This app helps users quickly measure trees to estimate carbon sequestration. It manages sample plots, planting campaigns, and tree data collection, even offline. Features include a visual interface for measurements, data management, and a map tool for planting locations.
- Estimate carbon sequestration in woody biomass
- Manage sample plots and tree data
- Record tree diameter and height
- Geolocation and photo capture
- Offline data collection
- Map tool for planting locations
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Working Trees App provides a way to simply and quickly acquire the measurements needed to estimate carbon sequestration in woody biomass. Measure the parameters needed to estimate the carbon stored in trees. Manage sample plots, tree planting campaigns, and tree data collection efforts. Use structure-from-motion analysis to record tree diameter and tree height, geolocation, photos, and more. Don’t have cellular service? No problem - your data will get uploaded once you’re back in range. Features include: - Visual interface to measure trees - Data management for sample plots - Map tool to record tree planting locations
Screenshots
Verdict
The clearest difference is update cadence: Working Trees App at monthly against MRTN Rate Calculator's every 5 months. MRTN Rate Calculator's advantage is iOS requirement (10.0 vs 15.0). On price, rating, ratings volume and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for MRTN Rate Calculator against 5.0 for Working Trees App. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
MRTN Rate Calculator ships an update every 5 months, Working Trees App monthly. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.
| Parameter | MRTN Rate Calculator | Working Trees App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 57 MB | 78 MB |
| Age rating | 4+ | 4+ |
| Developer | University of Illinois | WORKING TREES, INC. |
Customer experience
MRTN Rate Calculator
Working Trees App
In-app purchases
MRTN Rate Calculator
No in-app purchases
Working Trees App
No in-app purchases
Questions
Is MRTN Rate Calculator free?
Is Working Trees App free?
Which has better reviews, MRTN Rate Calculator or Working Trees App?
Do MRTN Rate Calculator or Working Trees App have ads?
Which is updated more often, MRTN Rate Calculator or Working Trees App?
Other comparisons
