Comparison

Simple Power Grader vs TeacherTool 7 Flex

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

Head to head
About

Simple Power Grader

This app offers a simple yet powerful tool for educators to create and apply custom grading scales. It supports various international grading systems and allows for detailed customization of how scores are translated into grades, ensuring fair and transparent evaluation.

Highlights
  • Customizable grading scales
  • Supports international grading systems
  • Option to count half points
  • Error grading scale option
  • Multiple output formats for grades
  • Save and export grading scales (Pro)
  • Data protection focused
Features
Read full description

The Teachers' Friend (aka Der Lehrerfreund) grading scale is considered the standard for assigning grades worldwide. Advantages: โ†’ absolutely simple handling โ†’ fair, transparent grading โ†’ individual setting options (depending e.g. on the level of demand of your class work). 100% data protection - as no data is passed on Especially as a teacher or educator, you have to pay close attention to what happens with your own data. No problem with the Lehrerfreund grading scale calculator: all data remains on your smartphone, even in the Pro version. Reliable and competent calculation calculators - for over 10 years! In the last 10 years, the Teachers' Friend grading scale calculators have been used millions of times on the internet. We are constantly updating and optimizing the calculation logic - there is probably hardly anyone who has deeper knowledge about grading scales than we have. The grading scale app takes this established system to the next level: โ†’ Numerous setting options. Although the operation is conceivably simple (enter maximum score and tap CALCULATE button), there are numerous setting and customisation options, e.g: - Count half points or half correct answers - Grading scale for questions - Errors grading scale (e.g. for vocabulary tests) - Output as whole, half, third, quarter, tenth grades - Different grading scales (USA a.o.: A-F or A+/A/A- to F, custom scales can be set, e.g. 100-0, Germany 1-6, Germany upper level 15-0, Switzerland 6-1, Austria 1-5). - Different calculation logics - Classical grading scale (linear distribution) - New also with kink - grade scale (pass mark in %) - Base key (defined minimum/maximum limits) - K1/K2 (German KMK standard, takes into account deviation in some German provinces) - German CCI/IHK grading scale โ†’ Pro functions (after expiry of the trial version with 10 free calculations): By subscribing a yearly or half-yearly plan, you gain access to further valuable functions: - Saving your grading scales with name and remark ("Dictation class 8b - difficult") - So you can access the same grading scales several times or have your grading scales immediately at hand in discussions with students and parents. - Export your grading scales as PDF - to share, print, archive - Export your grading scales as CSV for Excel or similar for further processing in Excel or in pupil/class administration apps. - You support the continuous development and improvement of the Teachers' Friend grading scale calculator. Terms of use (EULA): https://www.apple.com/legal

About

TeacherTool 7 Flex

Configure your grading and student tracking tool with flexible modules. Manage courses, students, and grades with professional features. Enhance functionality with optional purchases for attendance, timetables, and more.

Highlights
  • Create unlimited courses and manage students
  • Professional grading features
  • Track student educational performance
  • Optional modules for advanced features
  • Supports various grading systems
Features
Read full description

With TeacherTool 7 Flex, you get all the flexibility to configure "your" TeacherTool 7 to exactly fit your needs. Even with the basic module, you get all the features that are required for professional grading: you can create any number of courses, managing any number of students and get the complete grading features that make TeacherTool6 the best mobile grading software on the market (e.g. all national and international grading systems, recursive categories, weighting of individual grades, decimal and tendency grade input, remarks with reminders, etc.). If you need an App that will help you tracking your student's educational performance and will make suggestions for a final score, even the basic module of TeacherTool 7 Flex will fit your needs perfectly. Need more features? No problem: Just purchase the following modules at an affordable price: - Absence Management - Timetable with Annual Schedule - Checklists - Register - Data export - Net Services - Interactive Seating Plan - Printing and Reports - Examination Grade Types (Note: The screenshots on this page show a TeacherTool 7 Flex with all modules enabled) Each of these Modules exactly matches the functionality of the corresponding Modules of the full version, TeacherTool 7.

Screenshots

Simple Power Grader4 screens
TeacherTool 7 Flex4 screens

Verdict

The call

The clearest difference is review sentiment: Simple Power Grader at 56% against TeacherTool 7 Flex's 8%. Simple Power Grader also leads on price (Free vs $5.99). TeacherTool 7 Flex's advantage is update cadence (fortnightly vs every 2 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Simple Power Grader is free to download; TeacherTool 7 Flex costs $5.99 up front. Simple Power Grader sells 2 in-app purchases, starting at $2.49 per 6 months and TeacherTool 7 Flex sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Simple Power Grader ships an update every 2 months, TeacherTool 7 Flex fortnightly. The most recent releases landed on September 22, 2026 and October 27, 2026 respectively.

Scorecard3 real differences ยท 5 level
Simple Power Grader versus TeacherTool 7 Flex: the parameters behind the verdict, then further details
ParameterSimple Power GraderTeacherTool 7 Flex
PriceFree โ€” better$5.99
Positive reviews55.6% of reviews โ€” better8.3% of reviews
Update frequencyEvery 2 monthsFortnightly โ€” better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS15.0 โ€” better16.6
Further details โ€” not scored
Size79 MB65 MB
Age rating4+4+
DeveloperLehrerfreund GmbHUdo Hilwerling

Customer experience

Simple Power Grader

Written reviews9 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

TeacherTool 7 Flex

Written reviews12 reviews
Positive8.3%
Neutral25.0%
Negative66.7%

In-app purchases

2 purchases

Simple Power Grader

Subscriptions2
  • Pro Abonnement (6 Monate)$2.496 Months
  • Pro Abonnement (1 Jahr)$4.491 Year
9 purchases

TeacherTool 7 Flex

One-time9
  • Networking$1.99
  • Checklists$2.99
  • Register$2.99
Show 6 more
  • Export$2.99
  • Printing$2.99
  • Timetable$3.99
  • Absence management$3.99
  • Seating plan$3.99
  • Types of grades for exams$3.99

Questions

Is Simple Power Grader free?
Simple Power Grader is free to download, with in-app purchases available.
Is TeacherTool 7 Flex free?
TeacherTool 7 Flex costs $5.99, and also offers in-app purchases.
Do Simple Power Grader or TeacherTool 7 Flex have ads?
Neither Simple Power Grader nor TeacherTool 7 Flex shows ads.
Which is updated more often, Simple Power Grader or TeacherTool 7 Flex?
Simple Power Grader ships an update every 2 months, and TeacherTool 7 Flex fortnightly. Most recently, Simple Power Grader was updated on September 22, 2026 and TeacherTool 7 Flex on October 27, 2026.

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