Comparison

SQL Kurs & Zertifikat vs Perfboard Lab

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

Head to head
About

SQL Kurs & Zertifikat

Learn SQL from the basics to advanced dialects like MySQL and Oracle. This app is ideal for beginners and professionals seeking practical database skills. Earn a university certificate upon passing the online or campus exam.

Highlights
  • Learn SQL fundamentals
  • Practice with real-world examples
  • Study MySQL and Oracle dialects
  • Online or campus exam
  • University certificate awarded
  • ECTS credits for students
Features
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Ideal für Studierende und Berufstätige. Diese App unterstützt den FernUni-Zertifikatskurs. Das erste Kapitel ist zum Probelesen frei verfügbar. Für den vollständigen Inhalt ist eine Buchung über das CeW der FernUniversität in Hagen erforderlich. Ob der Datenbankspezialist Michael Stonebraker schon ahnte, dass die von ihm entwickelte Datenbanksprache bis heute von keiner neuen Sprache verdrängt werden würde? SQL ist trotz oder gerade wegen ihrer langen Geschichte nach wie vor das einzige Instrument zum Umgang mit relationalen Datenbanksystemen. Unübertroffen und souverän bewältig eine gut entworfene SQL-Datenbank sehr große Mengen an Daten. Sie hat in den letzten zwei Jahrzehnten große Umwälzungen erfahren und wurde zu einem umfangreichen modernen und komplexen Werkzeug. Der Kurs richtet sich an den ambitionierten Einsteiger in SQL, der sich noch nie mit SQL auseinandergesetzt hat. Spezielle Vorkenntnisse über Datenbanken sind nicht erforderlich. An der SQL-Weiterbildung können alle teilnehmen, welche die Sprache der relationalen Datenbanken praxisnah erlernen möchten. Der Kurs vermittelt Ihnen die wichtigsten Grundlagen relationaler Datenbanksysteme. Anhand praxisnaher Beispiele erlernen Sie den täglichen Gebrauch von SQL. Basis des Kurses ist der SQL-Sprachstandard. Darüber hinaus erlernen Sie die wichtigen Dialekte der Datenbanksysteme MySQL und Oracle. Die schriftliche Prüfung kann online oder an einem Campusstandort der FernUniversität Hagen Ihrer Wahl geschrieben werden. Mit bestandener Prüfung erhalten Sie ein Hochschulzertifikat. Studierende können zudem erworbene ECTS Punkte für ein Certificate of Basic Studies bescheinigen lassen. Weitere Informationen erhalten Sie auf der Webseite der FernUniversität Hagen unter CeW (Center elektronische Weiterbildung).

About

Perfboard Lab

Features
Read full description

Understand electronics by trying it out: Perfboard Lab turns your iPhone, iPad or Mac with Apple silicon into an electronics lab. Build a circuit and switch on the power. Right away you see what happens: LEDs light up, buzzers beep, motors turn and hum. And if your maths was off: it smokes, it sparks and the part burns out – without any real damage. SEE WHAT HAPPENS, INSTANTLY • Every change is computed instantly with real physics • Overloaded parts smoke in four levels until they burn out • The analysis explains in plain words what is wrong: an LED the wrong way round, a missing series resistor, a short circuit, an open circuit MEASURE LIKE IN A REAL LAB • Multimeter: voltage, current and power at every part • Oscilloscope: voltage and current over time OVER 20 REAL PARTS • DC voltage source, AC source, current source and breadboard power supply • Resistors, potentiometers, ceramic and electrolytic capacitors, inductors, switches • Diodes and Zener diodes, NPN and PNP transistors, N- and P-channel MOSFETs, relays, op-amps, voltage regulators and Timer NE555 • LEDs in six colours, an incandescent lamp, a buzzer with a real tone and a motor whose hum matches its turning • Real characteristics as in a parts catalogue, each with a short explanation JUST LIKE ON THE WORKBENCH • Draw wires with the pen – straight wires with bends and branches • Perfboard, with Perfboard Lab Pro also stripboard with cuttable strips and breadboard as used with Arduino • Copy parts with all their values; text labels annotate your circuit • Real 2.54 mm grid: what fits in the app fits on the real board • Bill of materials with every part and the length of every wire • With Perfboard Lab Pro you see your circuit in the 3D view: real parts on the board that you turn, tilt and measure PERFECT FOR SCHOOL AND CLASS • A guided tutorial builds your first circuit with you • AI-assisted tasks and explanations in Perfboard Lab Pro: tasks that suit your level, explanations step by step on the board. • Lots of ready-made examples: from an LED with a series resistor to logic circuits, transistors and op-amps • The interactive formula collection adapts to your circuit: with the power on, every worked example calculates with the measured values of your parts and shows where each number comes from. • Teachers pass their default settings on to the whole class as a file FOR EVERYONE • For iPhone, iPad and Macs with Apple silicon • In many languages and usable with VoiceOver and Voice Control • No ads, no tracking FREE The perfboard with almost all parts and their examples, text labels, the instruments and the simulation are free. A circuit can have up to 7 parts. Your circuit is kept automatically. PERFBOARD LAB PRO With “Perfboard Lab Pro” you save as many circuits as you like and keep working on the same circuit on iPhone, iPad and Mac. You export them as PDF with a bill of materials and share them with others. Plus circuits with more than 7 parts, op-amp, voltage regulator, Timer NE555, motor, Zener diode and current source with their examples, the stripboard and the breadboard with their examples, AI-assisted tasks and explanations, and the 3D view. • Try it free for 3 days, then a weekly subscription. The App Store shows the price in your currency before you buy. • The subscription renews automatically every week unless it is cancelled at least 24 hours before the end of the period. Payment is charged to your Apple Account. You can cancel at any time in your Apple Account settings under “Subscriptions”. • Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy policy: https://pascalschroeer.github.io/PerfboardLab_PrivacyPolicy/ Legal notice: https://pascalschroeer.github.io/PerfboardLab_PrivacyPolicy/#legal-notice

Screenshots

Perfboard Lab4 screens

Verdict

The call

The clearest difference is in-app purchases: SQL Kurs & Zertifikat at none against Perfboard Lab's 1. SQL Kurs & Zertifikat also leads on iOS requirement (13.0 vs 18.0). Perfboard Lab's advantage is update cadence (every 9 days vs every 18 months). On price, ads and device support 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. Perfboard Lab sells 1 in-app purchase, starting at $0.99 per 7 days. SQL Kurs & Zertifikat asks for nothing beyond the download.

UpkeepUpdate frequency

SQL Kurs & Zertifikat ships an update every 18 months, Perfboard Lab every 9 days. Both last shipped on October 29, 2026.

Scorecard3 real differences · 7 level
SQL Kurs & Zertifikat versus Perfboard Lab: the parameters behind the verdict, then further details
ParameterSQL Kurs & ZertifikatPerfboard Lab
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 18 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPadiPhone, iPad — better
Requires iOS13.0 — better18.0
Further details — not scored
Size66 MB35 MB
Age rating4+4+
DeveloperEberhard HeuelPascal Schroeer

In-app purchases

None

SQL Kurs & Zertifikat

No in-app purchases

1 purchases

Perfboard Lab

Subscriptions1
  • Perfboard Lab Pro3 Days trial$0.997 Days

Questions

Is SQL Kurs & Zertifikat free?
SQL Kurs & Zertifikat is free to download, with no in-app purchases.
Is Perfboard Lab free?
Perfboard Lab is free to download, with in-app purchases available.
Do SQL Kurs & Zertifikat or Perfboard Lab have ads?
Neither SQL Kurs & Zertifikat nor Perfboard Lab shows ads.
Which is updated more often, SQL Kurs & Zertifikat or Perfboard Lab?
SQL Kurs & Zertifikat ships an update every 18 months, and Perfboard Lab every 9 days. Most recently, SQL Kurs & Zertifikat was updated on October 29, 2026 and Perfboard Lab on October 29, 2026.

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