Comparison

LipSync Test Tool vs RF Link

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

Head to head
About

LipSync Test Tool

Read full description

Measure โ€” don't guess! Lip Sync is a precision tool for broadcast engineers, live production teams, and OB/streaming operators who need to verify and correct end-to-end AV sync across monitors, routers, encoders, and playout โ€” before you go live or between segments. KEY FEATURES โ€ข Visual & audio test pattern โ€” On-screen markers, beeps, and flash cues so lip offset is obvious in control rooms and on program monitors. โ€ข Customizable setup โ€” Match FPS (24โ€“60), tone frequency, and timing mode to your line standard or show format. Classic, Precision, and Precision+Fixed modes. โ€ข Real-time feedback โ€” Clear SOUND TOO EARLY / VIDEO TOO EARLY indicators plus timecode-style readouts in portrait and landscape for quick checks at the desk or in the truck. โ€ข Latency measure mode โ€” Point a second iPhone (camera + mic) at the program monitor for an end-to-end delay readout in milliseconds and frames. โ€ข QR anchor for long delays โ€” Enable QR on the pattern device for frame-guided flash/beep pairing when latency exceeds ~500 ms โ€” accurate measurements on high-latency paths up to several seconds. โ€ข Audio Only / Audio path โ€” NEW: Measure audio-line delay without flash or camera. The pattern phone sends chirp sweeps with embedded UTC over the speaker; the measure phone detects delay through PA, mixers, wireless IEM, or any wired audio path. Ideal for set mic โ†’ regie โ†’ PA checks. โ€ข Live measurement mode โ€” Keep measuring after the first result; the offset updates continuously until you tap Stop โ€” ideal for watching drift during line checks or while routing changes settle. โ€ข Measurement history โ€” Recent latency results saved in the Measure screen for quick comparison across runs, formats, or signal paths. โ€ข Event log โ€” Recent sync-related events in one place for handover notes or troubleshooting during a show. โ€ข Interface โ€” Dark, minimal UI for dimmed galleries, OB trucks, and fast orientation changes on iPhone and iPad. PRECISION & ACCURACY (2.1) โ€ข Precision mode aligns flash and beep durations to 25 ms for tighter, repeatable measurements. โ€ข Flash timing compensates for audio output latency on the pattern phone. โ€ข Improved flash detection on interlaced displays. โ€ข More robust beep onset detection and pairing for long latencies. PRIVACY When Audio Only or audio-path measurement is active, Lip Sync may use GPS satellite time to improve UTC accuracy outdoors. Only the satellite timestamp is used โ€” your location is never stored, displayed on a map, or used to track you. Indoors the app uses network time (NTP) instead. WHY LIP SYNC? In live shows and broadcast, sync drift shows up as complaints, replays, and lost trust. Lip Sync gives you a repeatable, end-to-end check you can run on any path โ€” not guesswork in the heat of a production. IDEAL FOR Broadcast facilities, live sports and entertainment, houses of worship with IMAG, corporate live events, streaming ops, and systems integrators commissioning live signal chains. Support: lipsync@audioimpact.at

About

RF Link

Features
Read full description

RF Link brings professional-grade RF path, radio line-of-sight, Fresnel zone and path-loss analysis to your iPhone, using the Longley-Rice (ITM) irregular terrain propagation model. Built for telecom engineers, RF planners, broadcasters and wireless network designers, it delivers accurate point-to-point link evaluation for frequencies from 20 MHz to 20 GHz. Whether you are planning microwave links, Wi-Fi backhaul, LOS radio links or long-distance wireless communication, RF Link predicts terrain impact, path loss and link feasibility in seconds. KEY FEATURES ITM Longley-Rice model (20 MHz - 20 GHz) - Industry-standard Irregular Terrain Model - Accurate diffraction, scatter and line-of-sight predictions - Multiple reliability and confidence combinations Radio line-of-sight analysis - Geometric LOS check - Earth-curvature LOS with adjustable k-factor - 60% first Fresnel zone clearance - Minimum clearance at obstruction points - Suggested tower height increase Terrain elevation profiling - High-resolution elevation sampling - Plots showing terrain, curvature, LOS and Fresnel zones - Zoomable charts you can share Coverage heatmap - Signal-strength coverage area around a transmitter - Rendered over real terrain on the map Path loss and link budget - Path-loss prediction - EIRP, RSSI, SNR and link margin - Clear pass, warning and fail indicators Clean, fast interface - Map-based transmitter and receiver selection - PDF report export - Plot image sharing and saving IDEAL FOR - Wireless network planners - Microwave and LOS link engineers - UAV and drone communication designers - Amateur radio operators - Students learning RF and propagation models RF LINK PRO Every install includes a number of free calculations. RF Link Pro removes the limit, and comes two ways: - Monthly subscription: unlimited path profiles and coverage maps, billed monthly, renewing automatically. - Lifetime: a one-time purchase, no subscription. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically at the same price and period unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel it any time in your Apple Account settings. Privacy Policy: https://pinchiyadav.github.io/RF_Link_App-privacypolicy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

LipSync Test Tool4 screens
RF Link4 screens

Verdict

The call

The clearest difference is price: RF Link at Free against LipSync Test Tool's $8.99. RF Link also leads on update cadence (every 3 days vs fortnightly) and iOS requirement (15.0 vs 17.6). LipSync Test Tool's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

RF Link is free to download; LipSync Test Tool costs $8.99 up front. RF Link sells 2 in-app purchases, starting at $1.99 per month. LipSync Test Tool asks for nothing beyond the download.

UpkeepUpdate frequency

LipSync Test Tool ships an update fortnightly, RF Link every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard4 real differences ยท 2 level
LipSync Test Tool versus RF Link: the parameters behind the verdict, then further details
ParameterLipSync Test ToolRF Link
Price$8.99Free โ€” better
Update frequencyFortnightlyEvery 3 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPod, Mac โ€” better
Requires iOS17.615.0 โ€” better
Further details โ€” not scored
Size5 MB47 MB
Age rating4+4+
DeveloperNorwin PalmeYogesh Yadav

In-app purchases

None

LipSync Test Tool

No in-app purchases

2 purchases

RF Link

Subscriptions1
  • RF Link Pro Monthly$1.991 Month
One-time1
  • RF Link Pro Lifetime$6.99

Questions

Is LipSync Test Tool free?
LipSync Test Tool costs $8.99, with no in-app purchases.
Is RF Link free?
RF Link is free to download, with in-app purchases available.
Do LipSync Test Tool or RF Link have ads?
Neither LipSync Test Tool nor RF Link shows ads.
Which is updated more often, LipSync Test Tool or RF Link?
LipSync Test Tool ships an update fortnightly, and RF Link every 3 days. Most recently, LipSync Test Tool was updated on October 31, 2026 and RF Link on November 5, 2026.

Other comparisons