Comparison

Grade Corner vs Practice Lock

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

Head to head
About

Grade Corner

Access your academic performance on the go. View grades, assignments, schedules, and attendance. Communicate with teachers and track your progress throughout the school year.

Highlights
  • Check grades and class categories
  • View upcoming assignments and due dates
  • Track attendance records
  • Email teachers directly
  • Filter assignments by category
  • View past grades
  • Supports multiple students
Features
Read full description

Grade Corner is the fastest way for students and parents to check grades, schedules, assignments, and attendance as part of your daily routine without logging in every time. Compatible with Aspen, Infinite Campus (beta), and PowerSchool (beta). This app is an independent tool students may use to calculate and track their own grades. === GRADE CORNER PREMIUM We are committed to providing every student full access to their grades without advertisements. We offer the following additional functionality to support the ongoing development of the app: - Grade Calculator — see your true percentage including missing assignments - Add hypothetical future assignments to see how they'd affect your grade - Edit current assignments to plan makeup work Important: The Grade Calculator is for estimation only and does not guarantee your final score. === PRIVACY & ENDORSEMENTS Grade Corner is a member of the Student Data Privacy Consortium (SDPC) and is available for schools to endorse in Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. === SUPPORTED SCHOOL DISTRICTS - School districts using Aspen Student Information System (SIS) - School districts using Infinite Campus - School districts using PowerSchool Grade Corner is an independent application and is not affiliated with, associated with, authorized by, endorsed by, or in any way officially connected with Follett School Solutions (Aspen Student Information System), Infinite Campus, Inc., PowerSchool Group LLC, or any school district using those systems, unless explicitly stated. === COMMON QUESTIONS Q: Do I need an existing account with my school's grading system? A: Yes. Grade Corner is a companion app — it uses your existing gradebook credentials. If you don't know yours, ask your school administrator. Q: How often are grades updated? A: As soon as teachers post them. When they update grades in the gradebook, you'll see the changes on your next refresh. Q: Is this app officially supported by my school district? A: Sometimes. Grade Corner was built independently by a parent with two kids in DC Public Schools. We're working on more official endorsements — the current list lives on our website. === DISCLAIMERS Grade Corner is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Follett School Solutions (Aspen Student Information System), Infinite Campus, Inc., PowerSchool Group LLC, or any of the school districts listed above, unless otherwise stated. Aspen is a trademark of Follett School Solutions. Infinite Campus is a trademark of Infinite Campus, Inc. PowerSchool is a trademark of PowerSchool Group LLC. All trademarks are the property of their respective owners. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Practice Lock

Master combination locks with a realistic digital simulator. Practice opening locks with helpful hints and step-by-step guidance. Customize your lock's appearance and choose your own or randomly generated combinations.

Highlights
  • Realistic lock unlocking simulation
  • Helpful hints for common mistakes
  • Step-by-step walkthrough mode
  • Customizable dial colors
  • Generate random combinations
  • Choose custom combination ranges
Features
Currently charting
Read full description

Combination locks can be tricky—especially when they're attached to lockers at your school. Practice beforehand so you know exactly how to open yours. REALISTIC UNLOCKING The lock behaves exactly like a real one. Spin the dial to enter your combination, then tap or swipe up on the shackle to open. If you want to start over, just keep spinning and enter the combination again. HELPFUL HINTS If you make a common mistake when opening the lock—like forgetting to spin one rotation to the left before your second number—you’ll be notified with a friendly hint. WALKTHROUGH MODE If you get stuck, don't worry. Enable Walkthrough Mode to get step-by-step instructions as you open the lock. CUSTOMIZE YOUR LOCK Choose from six different dial colors: red, yellow, green, blue, purple, or black. GENERATE A RANDOM COMBINATION, OR CHOOSE YOUR OWN If you want to test yourself, generate a combination randomly. Or, choose your own in one of two number ranges: 0-39 or 0-49.

Screenshots

Grade Corner4 screens
Practice Lock4 screens

Verdict

The call

The clearest difference is price: Grade Corner at Free against Practice Lock's $0.99. Grade Corner also leads on update cadence (weekly vs every 5 months) and ratings volume (28K vs 2K). Practice Lock's advantage is chart position (#112 vs unranked) and device support (4 vs 2). On rating, review sentiment, ads and in-app purchases 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

Grade Corner is free to download; Practice Lock costs $0.99 up front. Grade Corner sells 4 in-app purchases, starting at $3.99 per month and Practice Lock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Grade Corner against 4.8 for Practice Lock. That said, the two scores are not equally well evidenced: Grade Corner has 28K ratings behind it against 2K, so its average is the more settled of the two. Written reviews are what separate them: 82% of Grade Corner's written reviews are positive against 87% of Practice Lock's.

UpkeepUpdate frequency

Grade Corner ships an update weekly, Practice Lock every 5 months. The most recent releases landed on September 25, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 5 level
Grade Corner versus Practice Lock: the parameters behind the verdict, then further details
ParameterGrade CornerPractice Lock
PriceFree — better$0.99
Rating4.9 (28K ratings) — better4.8 (2K ratings)
Positive reviews81.6% of reviews87.1% of reviews — better
Number of ratings28K — better2K
Update frequencyWeekly — betterEvery 5 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
Best chart rank—#112 — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.415.0 — better
Further details — not scored
Size91 MB4 MB
Age rating4+4+
DeveloperLucky Dog Collective, LLCJames Randolph

Customer experience

Grade Corner

All ratings27,780 ratings
Positive97.7%
Neutral1.4%
Negative1.0%
Written reviews256 reviews
Positive81.6%
Neutral6.6%
Negative11.7%

Practice Lock

All ratings1,988 ratings
Positive95.7%
Neutral2.1%
Negative2.2%
Written reviews116 reviews
Positive87.1%
Neutral4.3%
Negative8.6%

User reviews

Grade Corner

From 28K App Store ratings

What we love

  • 👍 Easy to use and understand
  • 🚀 Quick access to grades and schedules
  • 💡 Customizable color themes
  • 🔒 Secure login process
  • 👍 Convenient for parents and students

Room to improve

  • 🐛 Occasional login issues
  • 🐛 Slow loading times
  • 💡 Need for more features (grade notifications, schedule view for future days)

Practice Lock

From 2K App Store ratings

What we love

  • 👍 Helpful for learning to open lockers
  • 🚀 Efficient at teaching lock-opening skills
  • 🎨 Customizable lock colors and types
  • 💡 Useful practice for middle/high school students
  • 🎉 Fun and engaging app

Room to improve

  • 💰 Paid app, could be better if free
  • 🤔 Sensitivity issues with lock turning
  • 🐛 Occasional left/right confusion in instructions

Bugs and requests

Grade Corner

Reported bugs

2 issues
  • Login screen freezes
  • No schedule information displayed

Requested features

4 requests
  • Grade notifications
  • Schedule view for future days
  • Ability to delete or rearrange classes
  • Integration with other platforms (e.g., Google Classroom)

Practice Lock

Reported bugs

2 issues
  • Lock turning too fast at times
  • Inconsistent behavior compared to real-life locks

Requested features

3 requests
  • Add sound effects when unlocking
  • Include a randomize option to reset the lock combination
  • Provide more lock types and difficulty levels

In-app purchases

4 purchases

Grade Corner

Subscriptions4
  • Monthly Subscription7 Days trial$3.991 Month
  • Six Month Subscription7 Days trial$12.996 Months
  • Annual Subscription7 Days trial$19.991 Year
Show 1 more
  • Family Plan$29.991 Year
1 purchases

Practice Lock

One-time1
  • Customize Lock$0.99

Questions

Is Grade Corner free?
Grade Corner is free to download, with in-app purchases available.
Is Practice Lock free?
Practice Lock costs $0.99, and also offers in-app purchases.
Which has better reviews, Grade Corner or Practice Lock?
Grade Corner is rated higher. Grade Corner averages 4.9 out of 5 from 28K ratings, while Practice Lock averages 4.8 from 2K ratings.
Do Grade Corner or Practice Lock have ads?
Neither Grade Corner nor Practice Lock shows ads.
Which is updated more often, Grade Corner or Practice Lock?
Grade Corner ships an update weekly, and Practice Lock every 5 months. Most recently, Grade Corner was updated on September 25, 2026 and Practice Lock on September 23, 2026.

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