Comparison

Simple Power Grader vs LessonPrep

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

LessonPrep

This app assists sports teachers with lesson planning. It offers a free lesson series without registration and a wider collection of resources for members, including games, sketches, and tips.

Highlights
  • Free lesson series
  • Extensive game collection
  • Clear setup sketches
  • Quick sports lessons
  • Cognitive promotion in sports
  • Useful tips for teachers
Features
Read full description

LessonPrep ist dein digitaler Begleiter für die Planung, Durchführung und Nachbereitung von Sportunterricht – für Grundschule, Sekundarstufe I und Sekundarstufe II. Spare Zeit bei der Vorbereitung und finde schnell passende Inhalte für deine Lerngruppe. Mehr als 80 durchstrukturierte Unterrichtsreihen mit über 400 Unterrichtsstunden begleiten dich von Klasse 1 bis Q2. Jede Reihe bietet einen klaren roten Faden; Ziele, Material, Ablauf, Zeitangaben, Differenzierung und Lehrplanbezug sind übersichtlich vorbereitet. DAS BIETET DIR LESSONPREP • Fertige Unterrichtsreihen und sofort einsetzbare Sportstunden • Inhalte für Sportspiele, Fitness, Leichtathletik, Schwimmen, Turnen, Tanz, Kooperation, Zweikampf und mehr • Lehrplanbezug für alle Bundesländer • Differenzierungen für unterschiedliche Leistungsniveaus • Stundenbaukasten für eigene Planungen • Favoriten sowie Stunden- und Schülernotizen • Synchronisierung deiner gespeicherten Inhalte zwischen deinen Geräten • Regelmäßig neue Inhalte SMARTE TOOLS FÜR DIE HALLE Nutze Gamecounter, Timer und Anzeigetafel direkt im Unterricht. Stelle mit dem Team-Creator faire Teams zusammen, speichere Klassen und plane mit dem Turnierplaner Spielpläne, Ergebnisse und Platzierungen. Eine umfangreiche Spielesammlung liefert zusätzliche Ideen für Sporthalle, Schwimmbad und Klassenraum. PLANEN. DURCHFÜHREN. AUSWERTEN. Erstelle eigene Stunden, speichere sie, dupliziere gelungene Planungen und passe sie flexibel an. Halte Beobachtungen, Materialhinweise und Reflexionen strukturiert fest. Private Notizen sind geschützt und nur für dich sichtbar. LessonPrep reduziert den organisatorischen Aufwand, damit mehr Zeit für das Wesentliche bleibt: guten Sportunterricht. DEIN PERSÖNLICHER ARBEITSBEREICH Deine eigenen Planungen, gespeicherten Klassen, Favoriten und privaten Notizen sind deinem LessonPrep-Konto zugeordnet. Für neue Nutzer stehen ein Monatsabo und ein Jahresabo als Apple In-App-Kauf zur Auswahl. Zuerst schließt du den Apple-Kauf ab. Anschließend erstellst du dein Konto oder verknüpfst ein bestehendes LessonPrep-Konto, um deinen persönlichen Arbeitsbereich zu öffnen. Bereits registrierte Nutzer können sich im oberen Loginbereich anmelden. Ein unterbrochener Kontoschritt kann ohne erneuten Kauf fortgesetzt werden; Käufe lassen sich wiederherstellen. Nutzungsbedingungen (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Simple Power Grader4 screens
LessonPrep4 screens

Verdict

The call

The clearest difference is in-app purchases: LessonPrep at none against Simple Power Grader's 2. Simple Power Grader's advantage is update cadence (every 2 months vs every 6 months). On price, review sentiment, ads and monetization model 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. Simple Power Grader sells 2 in-app purchases, starting at $2.49 per 6 months. LessonPrep asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Power Grader ships an update every 2 months, LessonPrep every 6 months. The most recent releases landed on August 9, 2026 and September 25, 2026 respectively.

Scorecard2 real differences · 6 level
Simple Power Grader versus LessonPrep: the parameters behind the verdict, then further details
ParameterSimple Power GraderLessonPrep
PriceFreeFree
Positive reviews55.6% of reviews — better53.8% of reviews
Update frequencyEvery 2 months — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size79 MB3 MB
Age rating4+4+
DeveloperLehrerfreund GmbHDennis Geckert

Customer experience

Simple Power Grader

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

LessonPrep

Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

In-app purchases

2 purchases

Simple Power Grader

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

LessonPrep

No in-app purchases

Questions

Is Simple Power Grader free?
Simple Power Grader is free to download, with in-app purchases available.
Is LessonPrep free?
LessonPrep is free to download, with no in-app purchases.
Do Simple Power Grader or LessonPrep have ads?
Neither Simple Power Grader nor LessonPrep shows ads.
Which is updated more often, Simple Power Grader or LessonPrep?
Simple Power Grader ships an update every 2 months, and LessonPrep every 6 months. Most recently, Simple Power Grader was updated on August 9, 2026 and LessonPrep on September 25, 2026.

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