Round Trip Latency Meter vs True Pan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Round Trip Latency Meter
This app measures the real-world round trip latency of an iOS audio system. It plays test tones and records their return to calculate latency, requiring a loopback cable connection.
- Measures real-world round trip audio latency
- Plays test tones
- Records returning tones
- Requires loopback cable connection
- Tests iOS audio systems
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>>> Check out the demo videos at onyx3.com/LatencyMeter LatencyMeter app measures the real-world Round Trip Latency (RTL) of a given iOS audio system*. It functions by playing short test tones while simultaneously recording (listening for) the tones to return back to the input. This technique requires patching a loopback cable between audio system’s input and output. (* iOS audio system here refers to the combination of an iPhone/iPad paired with particular external audio interface)
True Pan
This audio plugin allows for lossless repositioning of stereo recordings, preserving the stereo field's geometry. It enables fully reversible panoramic rotations without compressing the stereo image and supports advanced transformations and modulation effects for creative sound design.
- Lossless stereo field repositioning
- Fully reversible panoramic rotations
- Advanced transformations and modulation
- Preserves spatial information in ambience/reverb
- Tempo-synced LFOs for rhythmic motion
- Dynamic stereo spread controls
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True Pan makes it possible to reposition stereo recordings while perfectly preserving the geometry of the stereo field. This allows for lossless, fully reversible panoramic rotations that don't compress the stereo image. The plugin also supports more intense transformations and modulation effects. True Pan can be used to: • Pan sounds that are rich in ambience or reverb without diminishing spatial information • Adjust stereo field recordings, freely rotate the entire sound field (e.g. to change what's in front) • Easily shift sonic perspectives of fx-rich, layered stereo instrument patches • Explore a new dimension of positional reverberation • Add subtle motion to, or "liven up" omnidirectional sounds (can also be used as a special chorus effect at higher rates) • Add a dynamic spatial quality to arpeggiated or rhythmic passages using the tempo sync feature with different LFO types • Apply stronger modulation for sound design and creative uses (creating warble, flutter or stereo tremolo and glitch effects) • Aid and speed up workflows for multi-mic setups When used as a post-processor for reverbs, True Pan can provide higher temporal density and smoothness than what pre-panned reverb inputs would allow. This directly translates to a better quality, but can also be viewed as a different physical setup of the sound source and the listener in relationship to the boundaries of the acoustic space. Thus it opens up additional degrees of freedom in positioning. The plugin's approach to quality preservation is best demonstrated by its ability to transform processed audio back to its original state, by applying a reverse rotation. The included stereo spread controls incorporate features that aim to minimize volume fluctuations by adapting to the actual input signal and its M/S gain distribution, including a fully dynamic adaptive mode, and a snapshot-based one. PLEASE NOTE: • An Audio Unit v3 compatible host app is required to use this plugin • Dual mono inputs from two microphones need to be converted to a single stereo signal in order to be processable
Screenshots
Verdict
The clearest difference is review sentiment: True Pan at 100% against Round Trip Latency Meter's 0%. True Pan also leads on rating (5.0 vs 1.0) and price ($4.99 vs $9.99). On update cadence, ads, in-app purchases and monetization model 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
Round Trip Latency Meter costs $9.99 and True Pan $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
True Pan holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: True Pan has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Round Trip Latency Meter's written reviews are positive against 100% of True Pan's.
Round Trip Latency Meter ships an update every 31 months, True Pan every 17 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Round Trip Latency Meter | True Pan |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | 1.0 (1 ratings) | 5.0 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 31 months | Every 17 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | ONYX Apps | quantovox |
Customer experience
Round Trip Latency Meter
True Pan
In-app purchases
Round Trip Latency Meter
No in-app purchases
True Pan
No in-app purchases
Questions
Is Round Trip Latency Meter free?
Is True Pan free?
Which has better reviews, Round Trip Latency Meter or True Pan?
Do Round Trip Latency Meter or True Pan have ads?
Which is updated more often, Round Trip Latency Meter or True Pan?
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