Comparison

Sentry vs Scratch Odds

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sentry

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
Read full description

Sentry-SECURE elevates situational awareness amongst law enforcement stakeholders that are critical to the alarm monitoring strategies being implemented by the Office of Radiological Security’s Protect strategy. The Office of Radiological Security uses these strategies to partner with government, first responders, and businesses to protect strategic assets around the world.

About

Scratch Odds

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
Read full description

Some scratch-offs still have all their top prizes. Others are picked clean — but stores keep selling them anyway. SmartScratcher shows you which is which. We track every active scratch-off in 15 states using official lottery data, then give every game a SmartScratcher Score so you can spot the good ones in seconds. Know before you scratch — grab the good ones, leave the losers. Free to use. Premium ($2.99/month, 3-day free trial) unlocks the full Score and analysis for every game. — HOW IT WORKS — Every state lottery publishes how many prizes are left in each scratch-off game. What they DON'T publish is how many tickets are still out there — and without that, you can't tell a great game from a dead one. SmartScratcher does the math for you. We estimate the remaining tickets, calculate the current value of each game, and roll it all into a single SmartScratcher Score. Open the app, see what's worth playing today, and skip the games that have already paid out. — FREE FEATURES — - Browse every active scratch-off in all 15 supported states - See ticket prices and remaining prize counts - Recently ended games — see what the lottery just pulled, with final numbers - Switch between states anytime - Light and dark mode — pick the look you like - Updated daily from official state lottery data — PREMIUM FEATURES ($2.99/month) — - SmartScratcher Score — our proprietary rating that combines value, remaining tickets, and jackpot availability into one number - Daily Deep Dive — a short, fresh write-up on every game, every day: what changed and what it means - Smart Sort — best games to the top automatically - Game Temperature — quick hot/cold indicator - Pros & Cons — plain-English summary of what's good and bad about each game - Estimated Value — how much you're getting back per dollar right now - Estimated Tickets Remaining — the number nobody else gives you - Value Trend Charts — watch a game's ticket value move over time, jackpot claims included - Game Comparison — rank games at the same price point side-by-side - Detailed Odds Table — current odds vs. launch odds, every prize tier - Daily Summary — what changed overnight, delivered automatically — WHO THIS IS FOR — Regular scratch-off players who want to play smarter. We're not a math degree, we're not a get-rich-quick scheme. We're the friend who actually checks the prize sheet before walking up to the counter. — SUPPORTED STATES — California, Florida, Georgia, Maryland, Massachusetts, Michigan, Missouri, New Jersey, New York, North Carolina, Oklahoma, South Carolina, Texas, Virginia, Washington. More states coming based on player demand. — SUBSCRIPTION DETAILS — Premium is $2.99/month with a 3-day free trial. Subscriptions auto-renew unless canceled at least 24 hours before the end of the trial or current period. You can manage or cancel anytime in your Apple ID account settings. — PLAY RESPONSIBLY — SmartScratcher is an information tool and does not guarantee winnings. Must be 18+ (21+ in some states). If the lottery stops being fun, the National Problem Gambling Helpline is 1-800-GAMBLER. Terms of Use (EULA): https://www.smartscratcherapp.com/terms-of-service.html Privacy Policy: https://www.smartscratcherapp.com/privacy-policy.html Terms of Use (EULA): https://www.smartscratcherapp.com/terms-of-service.html Privacy Policy: https://www.smartscratcherapp.com/privacy-policy.html

Screenshots

Sentry4 screens
Scratch Odds4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 5 level
Sentry versus Scratch Odds: the parameters behind the verdict, then further details
ParameterSentryScratch Odds
PriceFreeFree
Rating3.7 (6 ratings)5.0 (3 ratings) — better
Number of ratings6 — better3
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better17.5
Further details — not scored
Size56 MB14 MB
Age rating4+17+
DeveloperVPI EngineeringGaming Data Solutions LLC

Customer experience

Sentry

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

Scratch Odds

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sentry

No in-app purchases

3 purchases

Scratch Odds

Subscriptions2
  • Premium Access3 Days trial$2.991 Month
  • SmartScratcher Monthly Access3 Days trial$4.991 Month
One-time1
  • Monthly Subscription$4.99

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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