Slope Calculator vs Dumpy Pro.

Use this App to calculate slope (Angle, Percentage, Ratio). You just need to enter 2 of the 3 sides of a right triangle, we will calculate for you the remaining necessary numbers. This is a very intuitive App, simple and easy to use. Results are estimates for informational purposes only. We are very happy to serve you. If you have any requests, don't hesitate to contact us. - https://www.facebook.com/phan.nhatdang.3/ - phannhatd@gmail.com

Dumpy Pro — Digital Level Book The level book that belongs on every surveyor's phone. Record, check, and export your field data without paper, without a laptop, and without losing anything. LEVEL BOOK Work exactly as you would on paper — but faster. Enter your Backsight, Intermediate Sights, and Foresight readings using the Height of Collimation method. Every HC and RL is calculated instantly as you type. A live closure check at the end of each run tells you whether your arithmetic passes in seconds, not minutes. Change points are automatically detected when you move the instrument. Undo the last reading with a single tap if you mis-book. Export a professionally formatted PDF level book or a CSV spreadsheet to share with your engineer or client directly from the field. SET-OUT Enter a design RL and Dumpy Pro tells you exactly what staff reading to look for. No mental arithmetic, no pocket calculator. Import your design points from a CSV file — map the columns once and every peg is ready to go. Live Mode shows the cut or fill in real time for the point you're setting out, so you can work continuously without looking away. Staff readings update automatically if you re-level and enter a new HC. Export your set-out sheet as a PDF or CSV. AS-BUILT SURVEY Record actual RLs against design RLs and let the app assess every point against your tolerance. Import design data from CSV, or enter points manually. Points are flagged as pass, fail, or pending. Attach photos to any point directly from the field. Export a full as-built report as a PDF or CSV. DRAINAGE Set up a drainage run with a start invert level and a grade. Dumpy Pro calculates the design invert at every chainage you enter and compares it to your as-laid reading. The exact signed percentage to dial into your laser or machine — negative for falling, positive for rising — is displayed prominently on every run card. Export the full run as a CSV report. SITE COMMS Real-time two-way communication between instrument operator and staffman — works over Wi-Fi or a local hotspot, no mobile signal required. The operator sees live staff readings and calculated RLs; the staffman receives cut/fill instructions as each point is recorded. TWO PEG TEST Check your level's collimation accuracy on site before you start. Enter four staff readings and the app calculates the collimation error per 60 m — pass or fail — with a step-by-step guide built in. ENGINEERING CALCULATOR A quick-access calculator for common survey maths, available from any screen. JOB FOLDERS Keep your site organised. Create a job folder for each project and add as many level books, set-out files, and drainage runs as you need. All data auto-saves and is stored in the app's Documents folder — visible in the iOS Files app under On My iPhone › Dumpy Pro, survives app updates and reinstalls, and can be backed up or transferred at any time. Share a complete job with a colleague via AirDrop, Messages, or the Files app with one tap. BUILT FOR THE FIELD Dark and light mode — readable in any light condition Imperial and metric — switch between metres and feet & inches in Settings; all readings, exports, and tolerances update throughout the app Large numeric inputs designed for gloved hands Keyboard dismiss button that moves to your dominant hand Haptic feedback confirms every reading added Fully offline — no account, no subscription, no internet required Customisable reading labels (rename BS/IS/FS to match your company's notation) Built-in help sheet on every screen Built-in glossary covering RL, BS, IS, FS, HC, TBM, invert levels, closure, and more Whether you're levelling for a building slab, setting out kerb lines, checking as-laid drainage falls, or verifying as-built levels, Dumpy Pro keeps up with you on site. For professional reference use only. All results must be independently verified by a qualified engineer or surveyor before use on site.