Comparison

SynQR vs Höllentor

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

Head to head
About

SynQR

This utility helps synchronize audio and video playback by accurately measuring real-time offsets. It assists users in adjusting their setups for perfect synchronization, especially in Digital Audio Workstations and Non-Linear Editors.

Highlights
  • Real-time offset measurement
  • Synchronization adjustment
  • Supports DAWs and NLEs
  • Uses film leaders/test videos
  • Downloadable test materials
Read full description

Are you struggling with out-of-sync video playback? Do you feel uncomfortable guessing your DAW's video offset based on a 2-pop? Say goodbye to guesswork. With SynQR, you can measure the video offset of your playback system in real-time. In DAWs and NLEs, audio and video are processed on separate hardware. This often leads to latencies that result in synchronization issues. Additionally, different video codecs can introduce varying offsets too. SynQR is a tool that accurately measures these offsets and displays them in real-time. Armed with this information, you can easily adjust your setup to achieve perfect synchronization. SynQR uses classic film leaders or special test videos for measurement, which can be downloaded at https://synqr.app/downloads. Whether you're using popular editing programs like Pro Tools, Adobe Premiere, Blackmagic Resolve, AVID Media Composer, Final Cut X, Nuendo, or Studio One, the offset information provided by SyncQR helps you make the necessary adjustments and optimally synchronize your audio and video signals. Who is SynQR for? • Sound Designers, Sound Editors, and Re-recording Mixers • Film and Video Editors • Cinema Operators • Home Theater Enthusiasts

About

Höllentor

Features
Read full description

Abandon all hope, ye who enter here. The words over Dante Alighieri's gate of Hell give this app its name: Höllentor, German for "gate of Hell." And how fitting: anyone who has routed a large audio-over-IP network live knows that patching hundreds of channels under time pressure can feel exactly like that. Höllentor is here to change that. Multi-routing by drag and drop Select multiple receivers at once and drag them onto a source — done. What otherwise takes one click per receiver happens in a single gesture. Ideal for the quick reconfiguration between soundcheck and show. Scenes instead of chaos Save complete routing states as named scenes — including labels, colors, and lock status. Choose the exact scope when saving and loading: individual devices, specific channels, or everything. Before applying, you get a preview of every change. Undo. Redo. At last. Route changes, label edits, and scene applications can be undone. With Cmd+Z you work as safely as in a text editor. Focus modes for a clear overview Show only active connections — or only warnings, i.e. routes whose source is no longer visible on the network. Individual warnings can be resolved directly via right-click: "Receive from" opens a three-level menu (device → group → channel), including custom labels. For locked channels, Höllentor asks first — and still lets you decide. Keyboard navigation Arrow keys to move through the matrix, spacebar to connect or disconnect. Shift jumps to the next group, Shift+Cmd to the next device. Clarity through structure Channels in configurable groups, collapsible devices, colors and labels for readable matrices — even with hundreds of channels. The iPhone version is still being optimized and will follow shortly. Höllentor is an independent product. It is not affiliated with, endorsed by, or sponsored by Audinate Pty Ltd. Dante® and Audinate® are registered trademarks of Audinate Pty Ltd.

Screenshots

SynQR4 screens
Höllentor2 screens

Verdict

The call

The clearest difference is iOS requirement: Höllentor at 15.0 against SynQR's 17.0. On price, update cadence, ads and in-app purchases 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. SynQR sells 4 one-off in-app purchases and Höllentor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SynQR ships an update monthly, Höllentor every 5 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
SynQR versus Höllentor: the parameters behind the verdict, then further details
ParameterSynQRHöllentor
PriceFreeFree
Rating3.2 (11 ratings) — better—
Positive reviews28.6% of reviews—
Number of ratings11 — better—
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size74 MB7 MB
Age rating4+4+
DeveloperBenjamin HoerbeTobias Heide

In-app purchases

4 purchases

SynQR

One-time4
  • Pro 7 Day TrialFree
  • Free Three-Day TrialFree
  • One-Year Edu Subscription.$0.99
Show 1 more
  • SynQR Pro$39.99
1 purchases

Höllentor

One-time1
  • Höllentor Pro$17.99

Questions

Is SynQR free?
SynQR is free to download, with in-app purchases available.
Is Höllentor free?
Höllentor is free to download, with in-app purchases available.
Do SynQR or Höllentor have ads?
Neither SynQR nor Höllentor shows ads.
Which is updated more often, SynQR or Höllentor?
SynQR ships an update monthly, and Höllentor every 5 weeks. Most recently, SynQR was updated on November 7, 2026 and Höllentor on November 5, 2026.

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