CellGrid

CellGrid is a fast, offline-first spreadsheet editor built for people who just
want to get work done on their phone. Open a CSV, make changes, share it. No
accounts, no cloud lock-in, no bloat.

Part of the DevHub suite — the same dark cyberpunk-utility design language as
our other tools, tuned for serious mobile use.

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WHAT IT DOES
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• Open and edit any CSV file from your device or cloud storage
• Frozen header row and row number column — your headers stay visible as you
scroll through large sheets
• Tap a cell to edit instantly, with the cursor placed where you expect it
• Undo and redo with a 50-step history
• Automatic draft saving — whatever you had open comes back on next launch,
even if you never hit save
• Sort any column ascending or descending
• Add, insert, duplicate, or delete rows and columns from a tap menu
• Search across all rows with instant filtering
• Share your sheet to any app via the system share sheet

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FORMULAS
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Type = in any cell to start a formula. CellGrid supports the functions real
spreadsheet users need:

• SUM, AVG (AVERAGE), COUNT, MIN, MAX
• SUMIF, COUNTIF with comparison criteria
• IF with full comparison operators (=, <>, <, >, <=, >=)
• ROUND, ABS for number formatting
• CONCAT, LEN for text
• Cell references (A1, B22) and ranges (B1:B10)
• Standard arithmetic: + - * / ^ with parentheses

Formulas survive sorting — when you sort a column, row-relative references
follow their data automatically. A formula bar at the top of the screen shows
the source of any selected formula cell so you can review it without entering
edit mode.

Error cells display in red with clear #ERR or #CIRC markers so broken
formulas stand out at a glance.

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EDITING, DONE RIGHT
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• Cut, copy, and paste individual cells with a floating action bar
• System clipboard integration — copy from CellGrid, paste into any app
• Long-press any row number or tap the column menu icon to insert, duplicate
or delete
• Back button clears your current selection before it exits the app, so you
never accidentally lose work
• Dirty indicator next to the filename shows exactly when you have unsaved
changes

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BUILT FOR PRIVACY
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CellGrid works entirely on your device. Your spreadsheets never leave your
phone unless you explicitly share them. There are no accounts to create, no
cloud sync, no tracking, and no subscription wall between you and your own
files.

CellGrid is free and supported by occasional interstitial ads shown after
document actions. No banner ads, no ads while you're editing, no data
collection beyond what the ad network requires.

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WHO IT'S FOR
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• Field workers who need to edit inventory or log data away from a desk
• Contractors tracking hours, expenses, or materials on the go
• Anyone who gets a CSV emailed to them and needs to fix a few cells without
firing up a laptop
• Developers working with CSV exports
• People tired of "free" spreadsheet apps that require a sign-in before you
can open a file

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FROM THE DEVHUB SUITE
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CellGrid is made by Techno Divine Solutions, the team behind the DevHub
developer and field-utility apps. Every app in the suite shares the same
design philosophy: focused tools that do one job well, look sharp, and
respect your time.