Comparison

US States Trainer vs Unlock HR

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

Head to head
About

US States Trainer

Master U.S. states, capitals, and flags with an adaptive learning system. This app uses spaced repetition and multiple learning modes to ensure long-term retention of geographical knowledge.

Highlights
  • Adaptive spaced repetition system
  • Multiple choice practice
  • Self-assessment for active recall
  • Learn states, capitals, and flags
  • Multiple question directions
  • Progress tracking with medals
  • Card browser for independent study
Features
Read full description

Understanding the geography of the United States begins with knowing America’s 50 states, their capitals and their flags. This knowledge helps provide context for news, travel and history, and builds a strong foundation for understanding regional differences. This app offers a structured learning system designed for long-term retention rather than short-term quiz repetition. At the core is an adaptive spaced repetition system that adjusts review intervals based on your actual memory performance. If you remember an item after a longer interval than expected, the next interval increases. If you hesitate or make a mistake, the interval decreases without resetting your progress. This ensures that your study time focuses exactly on what still needs reinforcement. Two learning modes support different learning preferences. Multiple Choice offers quick practice and is ideal for early recognition training. Self-Assessment strengthens active recall: you try to remember the answer before rating whether you knew it, almost knew it or did not know it. This approach is highly effective for long-term memory. The app includes all 50 U.S. states in a single clear category. You can choose between several question directions, such as State → Capital, Capital → State, State → Flag and Flag → State. You may adjust the configuration at any time without losing progress. Each category has its own test in which all items appear once. Based on your performance, you earn a silver or gold medal, giving you a clear overview of your progress. A full card browser is included for browsing states, capitals and flags independently of learning sessions.

About

Unlock HR

Features
Read full description

The app is a tool for HR professionals to expand their competencies, unlock their hidden HR potential, to transition into an HR professional of the future, and become a relevant and trusted adviser to the business and leaders. The app contains - a free plan with limited free material - 1-on-1 coaching to stand out and unlock the hidden HR potential INFORMATION ABOUT THE APP By signing up, you will get access to subscription(s) that include features such as progress tracking, and offline sync, available to subscribe free of charge. The download of Unlock HR is free of charge. Read our full Terms of Service and our Privacy Policy: https://passion.io/terms-of-service https://passion.io/privacy-policy

Screenshots

US States Trainer4 screens
Unlock HR2 screens

Verdict

The call

The clearest difference is in-app purchases: Unlock HR at none against US States Trainer's 1. US States Trainer's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 6 months). On price 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. US States Trainer sells 1 one-off in-app purchase. Unlock HR asks for nothing beyond the download.

UpkeepUpdate frequency

US States Trainer ships an update every 3 weeks, Unlock HR every 6 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 5 level
US States Trainer versus Unlock HR: the parameters behind the verdict, then further details
ParameterUS States TrainerUnlock HR
PriceFreeFree
Rating4.5 (22 ratings) — better—
Number of ratings22 — better—
Update frequencyEvery 3 weeks — betterEvery 6 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better26.0
Further details — not scored
Size32 MB91 MB
Age rating4+4+
DeveloperPhilipp StraubUnlock HR

In-app purchases

1 purchases

US States Trainer

One-time1
  • Pro Version$2.99
None

Unlock HR

No in-app purchases

Questions

Is US States Trainer free?
US States Trainer is free to download, with in-app purchases available.
Is Unlock HR free?
Unlock HR is free to download, with no in-app purchases.
Do US States Trainer or Unlock HR have ads?
Unlock HR shows ads; US States Trainer does not.
Which is updated more often, US States Trainer or Unlock HR?
US States Trainer ships an update every 3 weeks, and Unlock HR every 6 months. Most recently, US States Trainer was updated on November 3, 2026 and Unlock HR on October 30, 2026.

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