Changelog
Spreadsheets. No account.
Spark Grid 1.1 is out on the Mac App Store. October 15, 2026.
Big workbooks open faster. The sheet you’re editing stays quick. No account, and your files stay on your computer.
What’s new in 1.1
- Large workbooks open much faster and use less memory.
- Saving no longer freezes the window.
- Switching sheets is immediate, and calculated values stay put.
- The sheet you’re editing stays quick. Other sheets update in the background.
- Scrolling back to a page you’ve already seen is instant.
- Heavy formulas, including COUNTIFS, SUMIFS, SUMPRODUCT, and VLOOKUP, calculate faster on large sheets.
- Formula cells show their results. The formula stays in the formula bar.
- Sheet tabs stay in the file’s order.
- Blank formulas stay blank when the file is opened in Excel, instead of showing 0.
- Column widths and row heights stay as you set them after you save and reopen, including a blank row.
- Merged titles draw across the merge at full size, and continue through empty cells when the sentence is wider. Saving still stores the original merge and the original sentence.
- A title in the frozen columns stays put when you scroll. The rest is clipped at the freeze line.
- A section title lower in the sheet stays on its own row and no longer covers the frozen headers.
- Borders no longer cut through a merged title.
- Selecting a merged cell keeps the view on the cell you clicked.
- Command-A in the formula field selects that formula.
Longer notes
- Opening a large workbook is much faster. On the KPI file, the wait dropped from about 15 seconds to about half a second, and the app uses far less memory.
- Saving and autosave no longer freeze the window while the file is written.
- Switching sheets is immediate, and the values already calculated stay put.
- An edit on the sheet you’re looking at stays near-instant. A June edit measured 0.027 seconds. Other sheets update in the background after that.
- Scrolling a page you have already seen is instant. The first visit to a new part of a large sheet can still hitch.
- Heavy formulas on large sheets, including COUNTIFS, SUMIFS, SUMPRODUCT, and VLOOKUP, calculate faster.
- A cell with a formula shows the result. The formula stays in the formula bar.
- Sheet tabs open and save in the same order as Excel.
- Formulas Excel saved as blank stay blank on export, instead of showing 0 before Excel recalculates.
- A column or row you resize is still that size after you save and reopen, including a blank row. Widths and heights already in the file come back the same.
- Merged titles paint across the merge at full size. When the sentence is wider than the merge, it draws through the empty cells to the right. Saving still stores the original merge and the original sentence. Borders and fills no longer cut through the title.
- A title that starts in a frozen column or row stays with that pane. The scrolling part is clipped at the freeze line, so it does not slide under the frozen columns.
- A section title lower in the sheet stays on its own row. It does not paint over the frozen column headers when you scroll.
- Selecting a merged cell keeps the view on the cell you clicked.
- Command-A while the formula field is active selects that field’s text.
1.0
First Mac App Store release.