# Compound Interest Simulator vs Sentinel | Market Watcher

The clearest difference is in-app purchases: Sentinel | Market Watcher at none against Compound Interest Simulator's 10. Sentinel | Market Watcher also leads on ads (none vs shown) and update cadence (every 6 days vs every 2 months). Compound Interest Simulator's advantage is ratings volume (424 vs 2). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Compound Interest Simulator sells 10 one-off in-app purchases. Sentinel | Market Watcher asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Compound Interest Simulator against 5.0 for Sentinel | Market Watcher. That said, the two scores are not equally well evidenced: Compound Interest Simulator has 424 ratings behind it against 2, so its average is the more settled of the two.

Compound Interest Simulator ships an update every 2 months, Sentinel | Market Watcher every 6 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Compound Interest Simulator | Sentinel | Market Watcher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (424 ratings)](https://appshunter.io/ios/app/compound-interest-simulator/id1544655173/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sentinel-market-watcher/id6798092521/reviews)** |
| Number of ratings | **424** | 2 |
| Positive reviews | 81.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 35 MB | 32 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andre Leite Barbosa Costa](https://appshunter.io/developer/984337133) | [IdeaSynth](https://appshunter.io/developer/6798092523) |

## What reviewers say

### Compound Interest Simulator

[App page](https://appshunter.io/ios/app/compound-interest-simulator/id1544655173)

Visualize how your savings grow with compound interest. Plan for retirement, major purchases, or financial independence with detailed simulations and customizable options.

**Highlights:** Investment simulation, Savings growth visualization, Retirement planning, Financial independence goals, Basic and advanced modes, Customizable compounding frequencies, Multiple deposit/withdrawal scenarios

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Unlock All Themes | $0.99 | one-time |
| Remove Ads & Unlock All Themes | $1.99 | one-time |
| Remove Ads & Unlock All Themes | $2.99 | one-time |
| Remove Ads & Unlock All Themes | $3.99 | one-time |
| Remove Ads & Unlock All Themes | $4.99 | one-time |
| Remove Ads & Unlock All Themes | $5.99 | one-time |
| Remove Ads & Unlock All Themes | $6.99 | one-time |
| Remove Ads & Unlock All Themes | $7.99 | one-time |
| Remove Ads & Unlock All Themes | $8.99 | one-time |
| Remove Ads & Unlock All Themes | $9.99 | one-time |


### Sentinel | Market Watcher

[App page](https://appshunter.io/ios/app/sentinel-market-watcher/id6798092521)

Gain AI-powered stock market insights with real-time signals and predictions from experts. Features include an earnings calendar, stock screener, and customizable price alerts to keep you informed.

**Highlights:** AI-powered stock intelligence, Real-time signals and predictions, Earnings calendar, Stock screener, Price alerts

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

**In-app purchases:** none


## Frequently asked questions

### Is Compound Interest Simulator free?

Compound Interest Simulator is free to download, with in-app purchases available.

### Is Sentinel | Market Watcher free?

Sentinel | Market Watcher is free to download, with no in-app purchases.

### Which has better reviews, Compound Interest Simulator or Sentinel | Market Watcher?

Sentinel | Market Watcher is rated higher. Compound Interest Simulator averages 4.9 out of 5 from 424 ratings, while Sentinel | Market Watcher averages 5.0 from 2 ratings.

### Do Compound Interest Simulator or Sentinel | Market Watcher have ads?

Compound Interest Simulator shows ads; Sentinel | Market Watcher does not.

### Which is updated more often, Compound Interest Simulator or Sentinel | Market Watcher?

Compound Interest Simulator ships an update every 2 months, and Sentinel | Market Watcher every 6 days. Most recently, Compound Interest Simulator was updated on November 7, 2026 and Sentinel | Market Watcher on October 31, 2026.

---

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