# Sentry vs Scratch Odds

The clearest difference is rating: Scratch Odds at 5.0 against Sentry's 3.7. Scratch Odds also leads on update cadence (every 2 weeks vs every 3 months). Sentry's advantage is in-app purchases (none vs 3). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Scratch Odds sells 3 in-app purchases, starting at $2.99 per month. Sentry asks for nothing beyond the download.

Scratch Odds holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 6 and 3 respectively.

Sentry ships an update every 3 months, Scratch Odds every 2 weeks. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Sentry | Scratch Odds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (6 ratings)](https://appshunter.io/ios/app/sentry-secure/id1525626794/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/scratch-odds-smartscratcher/id6737247458/reviews)** |
| Number of ratings | **6** | 3 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 56 MB | 14 MB |
| Requires iOS | **16.6** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [VPI Engineering](https://appshunter.io/developer/888055894) | [Gaming Data Solutions LLC](https://appshunter.io/developer/1775570755) |

## What reviewers say

### Sentry

[App page](https://appshunter.io/ios/app/sentry-secure/id1525626794)

Enhances situational awareness for law enforcement and first responders involved in alarm monitoring strategies. It supports partnerships with government and businesses to protect strategic assets globally.

**Highlights:** Elevates situational awareness, Supports alarm monitoring strategies, Partners with government and first responders, Protects strategic assets globally

**Features:** Vision Pro support

**In-app purchases:** none


### Scratch Odds

[App page](https://appshunter.io/ios/app/scratch-odds-smartscratcher/id6737247458)

This app analyzes lottery scratch-off tickets to help players make smarter choices. It uses official data to provide a "SmartScratcher Score" and other insights, indicating which games have better odds and remaining prizes. Play more strategically by understanding game value and availability.

**Highlights:** Analyze scratch-off ticket odds, SmartScratcher Score for game rating, Track remaining prizes, Estimate tickets remaining, Daily updates from lottery data, Supported states: CA, FL, NY, NC, TX, OK

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $2.99 | per month |
| SmartScratcher Monthly Access | $4.99 | per month |
| Monthly Subscription | $4.99 | one-time |


## Frequently asked questions

### Is Sentry free?

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

### Is Scratch Odds free?

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

### Which has better reviews, Sentry or Scratch Odds?

Scratch Odds is rated higher. Sentry averages 3.7 out of 5 from 6 ratings, while Scratch Odds averages 5.0 from 3 ratings.

### Do Sentry or Scratch Odds have ads?

Neither Sentry nor Scratch Odds shows ads.

### Which is updated more often, Sentry or Scratch Odds?

Sentry ships an update every 3 months, and Scratch Odds every 2 weeks. Most recently, Sentry was updated on September 27, 2026 and Scratch Odds on September 29, 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.*