forecastsheets.com

What it is

ForecastSheets is a Google Sheets add-on from Tuxedo Software Limited with a very focused purpose: enabling users to forecast time-series data directly inside spreadsheets. It is well suited to scenarios where existing data is already stored in Google Sheets and shows monthly, yearly, or other seasonal patterns, avoiding the need to export data to another application before modeling.

Core features and integrations

The workflow is straightforward: install the add-on from Google Workspace Marketplace, open it from the Extensions menu in Google Sheets, select the historical data range, the range where forecast results should be filled in, and the model settings. The add-on then sends the data to its forecasting model and renders the results back into the spreadsheet within a short time. Its forecasting model is based on the Holt-Winters exponential smoothing method, with additive trend and additive seasonal components. The available materials do not show more advanced capabilities such as multiple model options, outlier handling, confidence intervals, or accuracy backtesting, nor do they mention any third-party integrations beyond Google Sheets.

Pricing, trial, and payments

The terms indicate that ForecastSheets is a SaaS product using a subscription model. Subscriptions renew automatically, and cancellation requires sending an email. Payment methods include credit cards and debit cards. The page provides a “Try it out” entry point, but it does not clearly state whether there is a free plan, free trial period, pricing, plan tiers, or usage limits, so purchasing transparency is only average.

Collaboration, security, and developer capabilities

For team collaboration and permissions, the available text does not disclose roles, sharing, organization management, or audit features. On security and compliance, the privacy policy mentions compliance with UK data protection law and the UK GDPR, and lists rights such as access, rectification, deletion, restriction of processing, data portability, and withdrawal of consent. Personal information is retained for 90 days. It is worth noting that the forecasting process sends spreadsheet data to its forecasting model, so organizations should further verify data processing boundaries before using it with sensitive business data. No API, SDK, webhook, or developer documentation is disclosed.

Pros, cons, and who it is for

Its strengths are that it is lightweight, easy to get started with, and fits naturally into the Google Sheets workflow. It is suitable for individuals, operations teams, finance users, or small teams forecasting recurring data such as sales, inventory, or traffic. Its drawbacks are opaque pricing, limited disclosure around model capabilities and enterprise management features, and reliance on the Google ecosystem.

Access from China

Because the product depends on Google Sheets and Google Workspace Marketplace, use in mainland China will usually be affected by the accessibility of Google services, and the actual experience may be partially limited. If an organization cannot reliably access Google, alternatives may include Excel Forecast Sheet, Python/R time-series tools, or forecasting features in domestic spreadsheet and BI products.