Comparison

ViewBack vs Sync

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

Head to head
About

ViewBack

Features
Read full description

This application allows a user to configure and monitor RF levels of a Vislink ViewBack receiver. The application communicates with the device via Bluetoothβ„’. Operating in the 2GHz licenced band, the receiver supports Vislink proprietary robust LMS-T demodulation in addition to low latency H.264 decoding. Outputs include HDMI and HDSDI, the latter being switchable, in wireless camera applications, between the local camera video and the return received video. A lens interface is provided to utilise the β€˜return’ button of the camera lens for switching the HDSDI output. On switching, picture interruption is avoided by use of local β€˜frame lock’ information extracted from the camera source. The Vislink ViewBack is supplied with flexible quarter-wave antennas, and various mounting options for camera and Steadicam rigs.

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

ViewBack4 screens
Sync4 screens

Verdict

The call

The clearest difference is in-app purchases: ViewBack at none against Sync's 4. ViewBack also leads on iOS requirement (11.0 vs 15.6). Sync's advantage is update cadence (every 9 days vs every 21 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sync sells 4 one-off in-app purchases. ViewBack asks for nothing beyond the download.

UpkeepUpdate frequency

ViewBack ships an update every 21 months, Sync every 9 days. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

Scorecard3 real differences Β· 3 level
ViewBack versus Sync: the parameters behind the verdict, then further details
ParameterViewBackSync
PriceFreeFree
Update frequencyEvery 21 monthsEvery 9 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS11.0 β€” better15.6
Further details β€” not scored
Size12 MB4 MB
Age rating4+4+
DeveloperVislinkSync-it.co.uk

In-app purchases

None

ViewBack

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 ViewBack free?
ViewBack is free to download, with no in-app purchases.
Is Sync free?
Sync is free to download, with in-app purchases available.
Do ViewBack or Sync have ads?
Neither ViewBack nor Sync shows ads.
Which is updated more often, ViewBack or Sync?
ViewBack ships an update every 21 months, and Sync every 9 days. Most recently, ViewBack was updated on October 1, 2026 and Sync on October 8, 2026.

Other comparisons