GEM: Dual Momentum Tracker
Your investments finally set.
About
This app provides a data-driven monthly signal for investment decisions based on a dual-momentum strategy. It helps users choose between US stocks, international stocks, and safe assets like Treasury bills, offering backtesting and performance tracking.
What's New in GEM
0.1.3
June 7, 2026
Monthly investment signal using the dual-momentum GEM strategy - backtest, compare, and invest smarter.
Subscriptions & In-App Purchases
Weekly Plan
GEM Tracker Pro features that get you extra insights
Developer apps
FAQ
What is the GEM strategy used by GEM?
The GEM strategy is a dual-momentum approach developed by Gary Antonacci. It involves a monthly check of the US stock market trend and then selecting between US stocks, international stocks, or safe assets based on 12-month momentum.
How does GEM help with investment decisions?
GEM provides a clear, data-driven monthly signal indicating whether to hold US equities (LONG SPY), international equities (LONG VEU), or move to Treasury bills (CASH BIL). This removes guesswork and emotional trading.
Can I backtest the GEM strategy with this app?
Yes, GEM offers full historical backtesting with Dollar-Cost Averaging simulations. You can compare GEM returns against Buy & Hold strategies over various periods and analyze maximum drawdowns.
What ETFs can I use with GEM?
GEM supports over 30 ETFs for each asset slot, including popular options for US Equities (SPY, VOO), International Equities (VEU, VXUS), and Safe Assets (BIL, SHV). Non-US listed ETFs are also supported.
Does GEM have ads?
Yes, GEM contains advertisements. As a free app with in-app purchases, advertisements are part of the user experience.
What are the subscription options for GEM Pro?
GEM Pro offers auto-renewing subscriptions with weekly ($0.99), 3-month ($10.99), and 1-year ($39.99) durations. Pro features include monthly signal alerts, extended backtest history, and a custom ETF watchlist.
How often is GEM updated?
The app was last updated on 2026-06-07 with version 0.1.3. Updates typically occur to provide new features and maintain reliability.
Is GEM available on all devices?
GEM is supported on iPhone, iPad, and iPod devices. The app is designed for iOS users.
