tec2SKILL Smart Maintenance vs Opamp tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
tec2SKILL Smart Maintenance
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Die Lernanwendung tec2SKILL® Smart Maintenance ist ein digitaler Assistent zur didaktischen Unterstützung im Bereich der CPS-i40 Stationen. Es werden ausgewählte Technologien von der ETS DIDACTIC GMBH unterstützt. Diese Lernanwendungen unterstützten Lernziele in folgenden Ausbildungsberufen: Industriemechaniker/in Zerspanungsmechaniker/in Anlagenmechaniker/in Werkzeugmechaniker/in Feinwerkmechaniker/in Konstruktionsmechaniker/in Metallbauer/in Mechatroniker/in Elektroniker/in für Automatisierungstechnik Elektroniker/in für Betriebstechnik KFZ Mechatroniker/in Techniker/in für Maschinenbau Techniker/in für Elektrotechnik
Opamp tools
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This app is the collection of operational amplifier calculators. It is suitable for hobbyist or electronic engineer. Features * Inverting amplifier * Non-Inverting amplifier * Differential amplifier * Summing amplifier * Inverting comparator * First-order filter * Second-order filter (HPF) * Phase shift oscillator * Colpitts oscillator * Limit 5 combinations of component values * Share CSV via AirDrop * Upload CSV to iCloud Drive (For iOS8 or later) Pro Features * Instrumentation amplifier * Non-inverting comparator * Second-order filter (LPF) * Wien bridege oscillator * Hartley oscillator * No limitation of the number of suggestions * Selectable 1%,5%,10%,20% of values
Screenshots
Verdict
The clearest difference is in-app purchases: tec2SKILL Smart Maintenance at none against Opamp tools's 1. Opamp tools's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, 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
Both are free to download. Opamp tools sells 1 one-off in-app purchase. tec2SKILL Smart Maintenance asks for nothing beyond the download.
tec2SKILL Smart Maintenance ships an update every 8 months, Opamp tools every 12 months. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.
| Parameter | tec2SKILL Smart Maintenance | Opamp tools |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 524 MB | 4 MB |
| Age rating | 17+ | 4+ |
| Developer | ETS DIDACTIC GMBH | Siu Yuen Ho |
In-app purchases
tec2SKILL Smart Maintenance
No in-app purchases
Opamp tools
- Unlock pro feature$1.99
Questions
Is tec2SKILL Smart Maintenance free?
Is Opamp tools free?
Do tec2SKILL Smart Maintenance or Opamp tools have ads?
Which is updated more often, tec2SKILL Smart Maintenance or Opamp tools?
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