S7 Link vs Circuit Resistance Creator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
S7 Link
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A NEW APP, THE FUNCTIONS YOU KNOW • All the functions and tabs of previous versions are kept: pushbutton panel, manual commands, variables, alarms, point tables, PLC links, CPU status, date and time, backup and sharing • Updating keeps your connections, tables, options and purchases; backups made with iS7 can be restored SUPPORTED PLCS CPUs of the S7-300, S7-400, S7-1200 and S7-1500 families and LOGO!, reachable on the network through ISO on TCP (RFC 1006). S7-1200 and S7-1500 need PUT/GET access enabled and DBs without optimized access. IN-APP PURCHASE Alarm management on real PLCs is available as an in-app purchase. Whoever has already bought it keeps it. SAFETY S7 Link can write to PLCs and act on machinery in operation. Use it with care and at your own risk, and do not rely on it for safety functions. In the background, iOS decides when alarms are checked, and it can be hours apart. Requires iOS 26 or later. Siemens, SIMATIC and S7 are trademarks of Siemens AG. S7 Link is an independent product, not affiliated with or endorsed by Siemens.
Circuit Resistance Creator
Calculate equivalent resistance for any resistor circuit. This tool is designed for students, technicians, and engineers, offering high accuracy for voltage, current, and resistance. It's a great way to check homework and perform engineering calculations.
- Equivalent resistance calculation
- Supports any resistor circuit
- High accuracy displays (6 decimal places)
- Apply custom circuit voltages
- Designed for students and engineers
- Homework checking tool
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Features: - Designed for students, technicians and engineers. - Find Equivalent Resistance for any resistor circuit. - Great Engineering tool. - Great for checking homework. - Super accurate with 6 decimal voltage, current and ohms displays. - Apply any circuit voltage from 1 to 1000 volts, with 3 decimal accuracy. - FREE and NO ADVERTISEMENTS.
Screenshots
Verdict
The clearest difference is price: Circuit Resistance Creator at Free against S7 Link's $14.99. Circuit Resistance Creator also leads on in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 4 months). On 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
Circuit Resistance Creator is free to download; S7 Link costs $14.99 up front. S7 Link sells 3 one-off in-app purchases. Circuit Resistance Creator asks for nothing beyond the download.
S7 Link ships an update every 4 months, Circuit Resistance Creator every 3 weeks. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.
| Parameter | S7 Link | Circuit Resistance Creator |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlo Trotti | David White |
In-app purchases
S7 Link
- Alarms$2.99
- Charts$2.99
- OPC Client$4.99
Circuit Resistance Creator
No in-app purchases
Questions
Is S7 Link free?
Is Circuit Resistance Creator free?
Do S7 Link or Circuit Resistance Creator have ads?
Which is updated more often, S7 Link or Circuit Resistance Creator?
Other comparisons
