Comparison

Simple Power Grader vs TeacherTool 7

Price, ratings, monetisation and update history for both apps, side by side — 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: → absolutely simple handling → fair, transparent grading → 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: → 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 → 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

This app streamlines teacher administration by combining a digital calendar, notebook, and timetable. It offers robust data security, customizable grading systems, and tools for tracking attendance, planning lessons, and managing student information.

Highlights
  • Digital calendar, notebook, and timetable
  • Secure student data management
  • Customizable grading systems (numeric, symbolic, emojis)
  • Attendance tracking and absence excuses
  • Lesson planning and material attachment
  • Automatic grade calculation
  • Interactive seating charts
Read full description

TeacherTool is a solution for teachers that combines three functions into one - digital calendar, notebook and timetable. TeacherTool was developed in practical use for practical applications and has been setting unrivaled standards in terms of data security, functional scope, ease-of-use and support since 2009. TeacherTool will revolutionize the way your student administration by making it more effective, easier to navigate and more customized. TeacherTool puts all of your key student information right at your fingertips so that it can be instantly accessed and edited. By assigning your own password and using powerful data encryption tools, you will also be able to protect the data against unauthorized access. If, for instance, a student inquires about his or her grade status, you will be able to spontaneously review with the student, criterion by criterion, his or her performance development based on compelling graphics. If a proposed grade is not in compliance with your pedagogic standards, you can make individual adjustments to the grade computation process at your discretion! Do you prefer to use symbols to grade your students’ work? - TeacherTool also has the capability to use symbolic grading systems (including Emojis for your youngest pupils!) The solution can readily convert conventional grades into symbols and vice versa – no adjustments required. If a student provides an excuse for an absence, you will be able to see when the student was absent in TeacherTool right away. Simply click on the identified time frame to excuse the absence. If you have to grade a test, all you have to do is define the number of points for each individual question and TeacherTool will automatically convert them for you. You can even use this tool for other types of assessments, e.g. in physical education. If you want to create a tally sheet for homework, you will find it convenient that TeacherTool treats all types of remarks/comments as tally sheets and that homework is just one of many possible applications. You may also want to record data during lessons in the classroom. Handling this task is one of the special capabilities of the TeacherTool! It knows your class schedule and is very versatile when it comes to making updates: it proposes times of absence to be logged, automatically calculates late arrivals, generates entries into the register and handles lots of other tasks. Do you have to plan and document lessons? Simply use the register to assist you with planning. Attach your digital teaching materials to each classroom hour scheduled or download them from the Cloud anytime you need them! Photograph your blackboard presentations and project the photos to the screen at the beginning of the next lesson to recap and review. Need some help remembering? – Of course there’s a tool for that. Simply take pictures of your students (after obtaining their consent), create an interactive seating chart and set up the TeacherTool to remind you of all organizational matters! TeacherTool is a universal app, i.e. you can install it on all of your iOS devices and use it simultaneously. Via encrypted data transfer, it is possible to synchronize the data between the different devices exclusively via your WLAN connection. Hence, no data is loaded onto external servers and you do not have to register yourself or your students anywhere to be able to use TeacherTool. TeacherTool is far superior to similar competitive products since it offers maximum data security and privacy. TeacherTool is also your best choice because of its expeditious and competent support services, which are at your disposal whenever you have any questions. To find out more, please visit www.teachertool.eu!

Screenshots

Simple Power Grader4 screens
TeacherTool 74 screens

Verdict

The call

The clearest difference is price: Simple Power Grader at Free against TeacherTool 7's $24.99. TeacherTool 7's advantage is in-app purchases (none vs 2) and update cadence (fortnightly vs every 2 months). On review sentiment, ads, device support and iOS requirement 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

Simple Power Grader is free to download; TeacherTool 7 costs $24.99 up front. Simple Power Grader sells 2 in-app purchases, starting at $2.49 per 6 months. TeacherTool 7 asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Power Grader ships an update every 2 months, TeacherTool 7 fortnightly. The most recent releases landed on September 22, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Simple Power Grader versus TeacherTool 7: the parameters behind the verdict, then further details
ParameterSimple Power GraderTeacherTool 7
PriceFree — better$24.99
Rating—3.7 (3 ratings) — better
Positive reviews55.6% of reviews — better47.6% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.6
Further details — 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

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews42 reviews
Positive47.6%
Neutral16.7%
Negative35.7%

In-app purchases

2 purchases

Simple Power Grader

Subscriptions2
  • Pro Abonnement (6 Monate)$2.496 Months
  • Pro Abonnement (1 Jahr)$4.491 Year
None

TeacherTool 7

No in-app purchases

Questions

Is Simple Power Grader free?
Simple Power Grader is free to download, with in-app purchases available.
Is TeacherTool 7 free?
TeacherTool 7 costs $24.99, with no in-app purchases.
Do Simple Power Grader or TeacherTool 7 have ads?
Neither Simple Power Grader nor TeacherTool 7 shows ads.
Which is updated more often, Simple Power Grader or TeacherTool 7?
Simple Power Grader ships an update every 2 months, and TeacherTool 7 fortnightly. Most recently, Simple Power Grader was updated on September 22, 2026 and TeacherTool 7 on October 30, 2026.

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