Comparison

DMARC Checker vs Modbus TCP FieldKit

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

Head to head
About

DMARC Checker

Features
Read full description

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.

About

Modbus TCP FieldKit

Features
Read full description

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

DMARC Checker3 screens
Modbus TCP FieldKit4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 2 level
DMARC Checker versus Modbus TCP FieldKit: the parameters behind the verdict, then further details
ParameterDMARC CheckerModbus TCP FieldKit
PriceFree — better$4.99
Update frequencyEvery 2 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size30 MB11 MB
Age rating4+4+
DeveloperFreex Ltd.Vladimir Chemeris

In-app purchases

None

DMARC Checker

No in-app purchases

None

Modbus TCP FieldKit

No in-app purchases

Questions

Is DMARC Checker free?
DMARC Checker is free to download, with no in-app purchases.
Is Modbus TCP FieldKit free?
Modbus TCP FieldKit costs $4.99, with no in-app purchases.
Do DMARC Checker or Modbus TCP FieldKit have ads?
DMARC Checker shows ads; Modbus TCP FieldKit does not.
Which is updated more often, DMARC Checker or Modbus TCP FieldKit?
DMARC Checker ships an update every 2 days, and Modbus TCP FieldKit every 3 weeks. Most recently, DMARC Checker was updated on May 18, 2026 and Modbus TCP FieldKit on September 17, 2026.

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