Tree Log Lift Calculator
Budget: $250 – $750 USD
I need a straightforward mobile app—running smoothly on both iOS and Android—that helps crane operators decide how long a log of a given diameter can be while staying within a chosen percentage of their crane’s capacity. Think of the workflow as a mirror image of “Log Weight Pro,” except instead of solving for weight I want the calculation to solve for length.
Here is the core flow I have in mind. The operator opens the app, moves slider controls to set crane capacity, desired safety percentage of that capacity, log diameter, and finally picks the tree species. A built-in species database supplies the density values so the user never has to look them up. When the sliders stop, the app instantly displays the maximum safe log length.
The calculation itself is simple physics—volume of a cylinder times species density—so accuracy matters. I’ll provide reference numbers for common species, and I expect the results to stay within a one-percent tolerance of those references.
Deliverables I expect:
• A compiled, store-ready build for iOS and another for Android, plus full source code.
• The embedded species-density table, editable in JSON or another straightforward format.
• A clean slider-based UI that responds in real time, with input validation so impossible values can’t be entered.
• A short technical note describing the formula and any assumptions.
I’m flexible on the tech stack—Swift/Kotlin or a cross-platform framework such as Flutter or React Native—as long as the final apps feel native and perform smoothly in the field. Let me know what approach you’d prefer along with a rough timeline for prototype and final release.
Here is the core flow I have in mind. The operator opens the app, moves slider controls to set crane capacity, desired safety percentage of that capacity, log diameter, and finally picks the tree species. A built-in species database supplies the density values so the user never has to look them up. When the sliders stop, the app instantly displays the maximum safe log length.
The calculation itself is simple physics—volume of a cylinder times species density—so accuracy matters. I’ll provide reference numbers for common species, and I expect the results to stay within a one-percent tolerance of those references.
Deliverables I expect:
• A compiled, store-ready build for iOS and another for Android, plus full source code.
• The embedded species-density table, editable in JSON or another straightforward format.
• A clean slider-based UI that responds in real time, with input validation so impossible values can’t be entered.
• A short technical note describing the formula and any assumptions.
I’m flexible on the tech stack—Swift/Kotlin or a cross-platform framework such as Flutter or React Native—as long as the final apps feel native and perform smoothly in the field. Let me know what approach you’d prefer along with a rough timeline for prototype and final release.