Comparison

RF Engineer's Calc vs Sync

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

Head to head

Companion app for Sync-it

Free

🔧 Utilities

No ratingsView app →

About

RF Engineer's Calc

Features

Read full description

A simple RF Engineer's Calculator. Convert Watts to dBm, calculate dBm power changes, convert Return Loss to VSWR, etc...

About

Sync

Read full description

Sync-it Plus is a professional companion app for any Sync-it hardware device. Get real time AV sync measurements when used with a hardware Sync-it. Record sync measurements and analyse them in slomo later using the app. Generate the Sync-it test pattern for hardware to measure. Works at all common frame rates and displays NTP time in the correct timecode format.

Screenshots

RF Engineer's Calc3 screens

Sync4 screens

Verdict

The call

The clearest difference is in-app purchases: RF Engineer's Calc at none against Sync's 4. Sync's advantage is update cadence (every 9 days vs every 10 months). On price, ads, device support and iOS requirement 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. Sync sells 4 one-off in-app purchases. RF Engineer's Calc asks for nothing beyond the download.

UpkeepUpdate frequency

RF Engineer's Calc ships an update every 10 months, Sync every 9 days. The most recent releases landed on September 5, 2026 and September 21, 2026 respectively.

Scorecard2 real differences · 4 level

RF Engineer's Calc versus Sync: the parameters behind the verdict, then further details
Parameter	RF Engineer's Calc	Sync
Price	Free	Free
Update frequency	Every 10 months	Every 9 days — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone	iPhone, iPod — better
Requires iOS	16.1	15.6 — better
Further details — not scored
Size	43 MB	4 MB
Age rating	4+	4+
Developer	GRAHAM JOHN SMITH	Sync-it.co.uk

In-app purchases

None

RF Engineer's Calc

No in-app purchases

4 purchases

Sync

One-time4

Hardware UnlockFree
Sync-It 14 Day TrialFree
Sync-it legacy unlock$44.99

Show 1 more

Sync-It Full Unlock$89.99

Questions

Is RF Engineer's Calc free?

RF Engineer's Calc is free to download, with no in-app purchases.

Is Sync free?

Sync is free to download, with in-app purchases available.

Do RF Engineer's Calc or Sync have ads?

Neither RF Engineer's Calc nor Sync shows ads.

Which is updated more often, RF Engineer's Calc or Sync?

RF Engineer's Calc ships an update every 10 months, and Sync every 9 days. Most recently, RF Engineer's Calc was updated on September 5, 2026 and Sync on September 21, 2026.