DMARC Checker vs Modbus TCP FieldKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DMARC Checker
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DMARC Checker is a security tool that allows you to easily check the email authentication settings of your domain. Main Features •Instant DMARC record check •Display of SPF and DKIM alignment status •Detailed analysis of policy settings •Verification of report destinations •Results displayed clearly in English Recommended For •Corporate staff who want to strengthen email security •Domain administrators •Those who want to implement anti-spoofing measures •Those considering phishing countermeasures How to Use 1.Enter your domain name 2.Tap “Check” 3.Review the results DMARC authenticates the sender of emails and is an essential technology for preventing spoofing and phishing. With this app, you can easily check your domain’s settings and improve your email security. With its simple and user-friendly interface, it can be used easily even without technical knowledge.
Modbus TCP FieldKit
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Modbus TCP FieldKit puts a professional Modbus TCP toolkit in your pocket. Commission equipment in the field, validate setups in the lab, or troubleshoot home automation — all from your iPhone. • Connect to any Modbus TCP device — read coils and registers, monitor data blocks in real time • Save device profiles for one-tap reconnection to frequently used endpoints • Write with confidence — every write operation requires your explicit confirmation • Built-in foreground simulator — run editable coils and holding registers for testing • Track active connections and review bounded local logs kept on your device • All data stays local — logs and exports are sanitized by default Requires Local Network access for device communication. Default server port is 1502. Background server operation and port 502 support pending device validation.
Screenshots
Verdict
The clearest difference is price: DMARC Checker at Free against Modbus TCP FieldKit's $4.99. DMARC Checker also leads on update cadence (every 2 days vs every 3 weeks) and iOS requirement (12.0 vs 18.0). Modbus TCP FieldKit's advantage is ads (none vs shown). On in-app purchases 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
DMARC Checker is free to download; Modbus TCP FieldKit costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DMARC Checker ships an update every 2 days, Modbus TCP FieldKit every 3 weeks. The most recent releases landed on May 18, 2026 and September 17, 2026 respectively.
| Parameter | DMARC Checker | Modbus TCP FieldKit |
|---|---|---|
| Price | Free — better | $4.99 |
| Update frequency | Every 2 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 30 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Freex Ltd. | Vladimir Chemeris |
In-app purchases
DMARC Checker
No in-app purchases
Modbus TCP FieldKit
No in-app purchases
Questions
Is DMARC Checker free?
Is Modbus TCP FieldKit free?
Do DMARC Checker or Modbus TCP FieldKit have ads?
Which is updated more often, DMARC Checker or Modbus TCP FieldKit?
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