Comparison

Grade Corner vs Practice Lock | Combination

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 | Combination

Master rotary combination locks with a realistic digital simulation. Practice opening lockers and safes with customizable configurations, a timer challenge, and guided assistance. Learn at your own pace or race against the clock.

Highlights
  • Realistic digital rotary lock simulation
  • Timer challenge for speed practice
  • Guided assistance and hints
  • Step-by-step walkthrough mode
  • Customizable combination ranges and sequences
  • Vibrant dial color options
Features
Read full description

Unlocking rotary combinations can become second nature with ample practice! Whether you're preparing for school lockers or a safe, Lock Practice brings you a hands-on simulation to master the twists and turns right on your screen. Customize configurations, race against a timer, and become adept at cracking combos! PRACTICE MAKES PERFECT Experience realistic unlocking with the in-app rotary combination lock. The digital dial behaves just like a real one. Rotate to enter your combination, then tap or swipe up to unlock. Made a mistake? Just keep spinning to reset and try again. TIMER CHALLENGE Test your unlocking speed with our Timer Challenge! Set your desired time and try to crack the combo before time runs out. It adds a fun and competitive edge to your practice! GUIDED ASSISTANCE Encounter a common hiccup? Our app will provide helpful hints to correct common mistakes like missing a crucial rotation before entering the next number. STEP-BY-STEP WALKTHROUGH Enable Walkthrough Mode for a guided experience. The step-by-step instructions will assist you through the process, ensuring you grasp the mechanics of unlocking a rotary combination. CUSTOMIZABLE COMBOS Exercise your skills with various configurations. Select from two number ranges: 0-39 or 0-49, generate random combinations, or input a custom combo to practice a specific sequence. VIBRANT DIAL COLORS Make your practice engaging with six lively dial colors: red, yellow, green, blue, purple, or black. Choose one that suits your style! PRACTICE ANYTIME, ANYWHERE Whether you're gearing up for the new school year or just honing your lock-picking skills, Lock Practice is your go-to app to learn and master rotary combination locks wherever you are! With Lock Practice, turning the dial towards unlocking success has never been more engaging and enjoyable!

Screenshots

Grade Corner4 screens
Practice Lock | Combination4 screens

Verdict

The call

The clearest difference is update cadence: Grade Corner at every 9 days against Practice Lock | Combination's every 3 months. Grade Corner also leads on ratings volume (29K vs 3.7K). On price, rating, review sentiment and ads 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. Grade Corner sells 4 in-app purchases, starting at $3.99 per month and Practice Lock | Combination sells 3 in-app purchases, starting at $1.99 per month. 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 4.7 for Practice Lock | Combination. That said, the two scores are not equally well evidenced: Grade Corner has 29K ratings behind it against 3.7K, 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 88% of Practice Lock | Combination's.

UpkeepUpdate frequency

Grade Corner ships an update every 9 days, Practice Lock | Combination every 3 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Grade Corner versus Practice Lock | Combination: the parameters behind the verdict, then further details
ParameterGrade CornerPractice Lock | Combination
PriceFreeFree
Rating4.9 (29K ratings) — better4.7 (3.7K ratings)
Positive reviews81.5% of reviews88.2% of reviews — better
Number of ratings29K — better3.7K
Update frequencyEvery 9 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size90 MB32 MB
Age rating4+4+
DeveloperLucky Dog Collective, LLCAyomide Omolewa

Customer experience

Grade Corner

All ratings28,401 ratings
Positive97.6%
Neutral1.4%
Negative1.0%
Written reviews265 reviews
Positive81.5%
Neutral6.8%
Negative11.7%

Practice Lock | Combination

All ratings3,388 ratings
Positive93.3%
Neutral3.5%
Negative3.2%
Written reviews254 reviews
Positive88.2%
Neutral5.1%
Negative6.7%

User reviews

Grade Corner

From 29K 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 | Combination

From 3.7K App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Helpful for learning to open lockers
  • 🤩 Life-saving for school
  • 🙌 Saved time and frustration
  • 💯 Effective practice tool

Room to improve

  • 🐛 Glitchy or buggy at times
  • ⏱️ Lock moves too fast for practice
  • 💰 Requires payment after limited free tries

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 | Combination

Reported bugs

3 issues
  • Combination reset issue
  • Visuals not displaying properly
  • Inconsistent performance

Requested features

3 requests
  • Customizable locker combinations
  • Motivational messages or rewards
  • More flexibility in settings

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
3 purchases

Practice Lock | Combination

Subscriptions3
  • Unlimited Access3 Days trial$1.991 Month
  • Unlimited Access3 Days trial$2.993 Months
  • Unlimited Access3 Days trial$4.991 Year

Questions

Is Grade Corner free?
Grade Corner is free to download, with in-app purchases available.
Is Practice Lock | Combination free?
Practice Lock | Combination is free to download, with in-app purchases available.
Which has better reviews, Grade Corner or Practice Lock | Combination?
Grade Corner is rated higher. Grade Corner averages 4.9 out of 5 from 29K ratings, while Practice Lock | Combination averages 4.7 from 3.7K ratings.
Do Grade Corner or Practice Lock | Combination have ads?
Neither Grade Corner nor Practice Lock | Combination shows ads.
Which is updated more often, Grade Corner or Practice Lock | Combination?
Grade Corner ships an update every 9 days, and Practice Lock | Combination every 3 months. Most recently, Grade Corner was updated on November 3, 2026 and Practice Lock | Combination on October 30, 2026.

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