Grain Moisture vs Rock Finder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grain Moisture
Calculate grain moisture accurately using dial readings and grain temperature. Features over 50 grain types with formulas based on up-to-date Canadian Grain Commission tables. Avoid outdated paper charts with this farmer-developed tool.
- Moisture calculation using dial reading and temperature
- Over 50 grain choices
- Formulas based on Canadian Grain Commission tables
- Replaces outdated paper tables
- Developed by farmers
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This app calculates grain moisture using the dial reading determined by the 919/3.5" or 393/3.5" moisture meter, and the grain temperature. Over 50 choices of grains built into one app using linear regression formulas based on up to date tables provided by the Canadian Grain Commission (CGC). Don't risk using the possibly out of date paper tables that came with the meter. An app made by farmers, for farmers at a reasonable price.
Rock Finder
This app helps farmers and landowners mark, manage, and track rocks on their property using an interactive map. Easily drop pins, edit locations, mark rocks as removed, and organize tasks by field. Collaborate with others by sharing your progress.
- Mark rock locations on a map
- Edit and delete pin locations
- Mark rocks as removed
- Organize rocks by field
- Share fields with collaborators
- Interactive map interface
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Rock Finder is a smart and simple mobile app designed to help farmers, landowners, and field workers keep their land clear of unwanted rocks. Whether you’re prepping a field for planting or just maintaining clean ground, Rock Finder makes it easy to mark and manage rock locations directly on an interactive map. Key Features: • Drop Pins to Mark Rocks: Quickly tap on the"Drop Pin" button to mark the location of a rock. • Edit Pin Location: Need to adjust the position? No problem—simply drag the pin to the correct spot. • Delete Mistakes: Accidentally dropped a pin? You can easily delete it anytime. • Mark Rocks as Removed: Once a rock has been cleared, mark it as “Removed.” The pin turns green, giving you a clear visual of what’s done and what’s left. • Organize by Field: Create and manage multiple fields to group your pins and stay organized across different areas of your property. • Share Fields with Others: Collaborate with workers or team members by securely sharing your fields and progress with them. Whether you’re tackling a new field or maintaining an existing one, Rock Finder gives you the tools to plan, track, and work more efficiently—right from your phone. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Rock Finder at Free against Grain Moisture's $2.99. Rock Finder also leads on update cadence (every 3 weeks vs every 7 months). Grain Moisture's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
Rock Finder is free to download; Grain Moisture costs $2.99 up front. Rock Finder sells 1 in-app purchase, starting at $24.99 per year. Grain Moisture asks for nothing beyond the download.
Grain Moisture ships an update every 7 months, Rock Finder every 3 weeks. The most recent releases landed on November 11, 2026 and October 30, 2026 respectively.
| Parameter | Grain Moisture | Rock Finder |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 7 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Sheila Elder | CARTER RONALD PETERSON |
In-app purchases
Grain Moisture
No in-app purchases
Rock Finder
- Annual Subscription14 Days trial$24.991 Year







