Support
Construction calculations, estimates, and project records for iPhone and iPad. Offline jobsite tools, with no subscription.
Free tools, trial and Pro — version 3.1 and later
Basic dimensional calculation, unit conversion, square / diagonal checks and equal spacing stay free. Pro adds the other construction calculators, expressions, new projects, quote editing and professional calculation PDF exports.
Tap Pro to explicitly start the 7-day Trial at no charge, or unlock Pro with one non-consumable purchase: US$1.00 in the USA, with Apple-managed regional prices shown before confirmation. The trial never converts into a charge or subscription. After seven days, basic tools and saved records remain available. Restoring a trial does not restart its original deadline.
Already paid to download an earlier version? Pro stays included after your original App Store purchase is verified. Use Restore purchases in the Pro screen with the same Apple Account if needed. Version 3.0 is the earlier all-features paid-download model. An App Store connection is needed to activate, buy or restore; verified access is cached for offline use.
Using calculations
Choose a tool in Workbench or Professional, enter dimensions, and calculate. You can use metric units, feet and inches, or fractions such as 6' 3 1/2". An explicit unit suffix takes priority over the selected default unit.
In Expression, write a complete calculation such as (3m + 50cm) / 2. Put a unit on each dimension. Choose degrees or radians for trigonometry. Approximate results are marked ≈.
Tap a history entry to restore its inputs. Editing a saved calculation retains its project and note. Memory registers store results for later use.
Estimates and projects
Open Projects to create a project or use Save to project on a result. Add material or labor rows and enter the quantity, unit, and unit price. You can also add a calculation result directly to an estimate.
Choose the project's currency and adjustment rates. Material waste is applied first, followed by labor, discount, markup, and tax. Rates are supplied by you. Changing the currency does not convert prices. The final total is rounded to the selected currency's decimal places.
Project notes are independent text records. You can add selected photos and files through the system pickers. Each attachment is limited to 10 MB; all attachments together are limited to 50 MB.
Export and backup
- Inside a project, export a quotation or complete report as PDF, or a table as CSV. The optional PDF attachment index lists attachments; it does not embed the original files.
- In Projects, choose Export complete JSON backup to include calculations, projects, notes, estimates, and original attachment data.
- Use Files to choose a destination, including iCloud Drive if available. Cloud storage is managed by the destination you choose. BenchCalc has no automatic cloud sync.
Importing a JSON backup replaces the whole notebook after validation. Export a copy of your current notebook first if you want to keep it. Invalid imports leave the current notebook unchanged. The app does not add password protection or encryption to exported backups.
Removing data
Swipe a calculation, note, estimate row, or attachment to remove it. Removing a project deletes that project's estimate rows, standalone notes, and attachments. Its calculations and calculation notes remain in history. Deleting an item in the app does not delete copies that you have already exported or shared.
If saving or importing fails
Check device storage and file size. A complete backup must be 80 MB or less. If the saved notebook cannot be read, BenchCalc preserves the original file and blocks changes rather than overwriting it. Keep existing exported backups and contact support before removing the app.
Languages and connectivity
Calculation tools work offline. Opening a cloud file or sending an export can require a connection through the service you select. The interface offers 24 language choices.
Contact
For questions, bug reports, and feature requests, use the BenchCalc support issue tracker. A GitHub account may be needed to post. Include your app version, device, selected tool, units, inputs, expected result, and actual result.
Issues are public. Remove private project information and do not attach complete backups or personal photos. Share only the details needed to reproduce the problem.