# Backtest Now vs GEM

The clearest difference is in-app purchases: Backtest Now at none against GEM's 3. GEM's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. GEM sells 3 in-app purchases, starting at $0.99 per 7 days. Backtest Now asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Backtest Now against 5.0 for GEM. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Backtest Now | GEM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/backtest-now/id6744331011/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/gem-dual-momentum-tracker/id6762083449/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 58 MB | 58 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [AVOHUB](https://appshunter.io/developer/1747189806) | [Airemes](https://appshunter.io/developer/1710129515) |

## What reviewers say

### Backtest Now

[App page](https://appshunter.io/ios/app/backtest-now/id6744331011)

Analyze investment strategies with historical market data. Test portfolios, including synthetic leveraged ETFs, and view results offline. Offers comprehensive performance analytics for data-driven investing.

**Highlights:** Synthetic Leveraged ETF Backtesting, Offline Access to Results, Backtesting Engine (1928-present), Comprehensive Performance Analytics, Supports Stocks, ETFs, Mutual Funds, CAGR and Sharpe Ratio Analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GEM

[App page](https://appshunter.io/ios/app/gem-dual-momentum-tracker/id6762083449)

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.

**Highlights:** Monthly investment signal, Dual-momentum strategy implementation, Backtesting and performance tracking, Customizable ETF selection, Smart notifications, Pro subscription for advanced features

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $0.99 | per 7 days |
| 3-Month Plan | $10.99 | per 3 months |
| Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is Backtest Now free?

Backtest Now is free to download, with no in-app purchases.

### Is GEM free?

GEM is free to download, with in-app purchases available.

### Which has better reviews, Backtest Now or GEM?

Backtest Now and GEM are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Backtest Now or GEM have ads?

Both Backtest Now and GEM show ads.

### Which is updated more often, Backtest Now or GEM?

Backtest Now ships an update weekly, and GEM weekly. Most recently, Backtest Now was updated on October 30, 2026 and GEM on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*