Comparison

Transfer Function vs dp SmartController

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

Head to head
About

Transfer Function

This app performs dual-FFT acoustic analysis for sound systems, including music. It offers magnitude, phase, and coherence graphs, a delay finder, and a signal generator. It can operate with internal microphones or external audio interfaces for comprehensive sound system monitoring and equalization.

Highlights
  • Dual-FFT acoustic analysis
  • Magnitude, Phase, Coherence graphs
  • Delay Finder
  • Signal Generator
  • Music as signal source
  • Internal microphone support
  • Two-channel audio interface compatibility
Features
Read full description

Transfer Function is a dual-FFT acoustic analysis app that is used for sound system audio analysis. Since it can operate with music as the signal source, it can be used during a musical performance to monitor and turn the system equalization during the show. Transfer function includes: -- Magnitude Graph -- Phase Graph -- Coherence Plot -- Delay Finder -- Signal Generator Normally a transfer function requires a two-channel interface, and that is true with this one, also, if you want to use it with program material (music). However, you can use our Transfer Funciton with the internal iOS microphone, if you can send the pink noise generator output to the sound system input. In this configuration, the internal generator is routed back to the input as the reference channel. You can measure delay, magnitude, and phase using this setup. When you use Transfer Function with a two-channel audio interface to run, such as the Studio Six Digital iAudioInterface2, then you can also use any audio source as the test signal, including music. See our website for more information.

About

dp SmartController

Features
Read full description

The dp SmartController App is a mobile smart control app specifically developed for dp UHD Media Player. It automatically scans the dp devices through a local area network and supports multi-device addition with higher flexibility for device control. It is the core tool for managing your multi-stream audio and video playback devices. Simulated Remote Control Function: Replace physical remote controls with a multifunctional control panel. It supports controlling almost all functions of the player, including Wake-On-LAN (WOL) for network-based power-on, text input, and more. You can completely eliminate the need for a physical remote. Data Browsing and Media On-Demand Function: Supports viewing and opening all local apps on the device. It allows browsing and opening media files, as well as viewing and syncing music library data from dp Music Player, including artist, album covers, and custom category browsing. It also provides regular playback controls and displays progress, file specifications, and lyrics. Additionally, it meets the need for playing high-quality lossless music without turning on the TV. Support for Video Playback Status Display: Supports selecting and playing video files from the mobile device’s file list, and displays the current video format information on the phone. It offers rich video playback control features, including progress dragging, video switching, audio track and subtitle selection, and more.

Screenshots

Transfer Function3 screens
dp SmartController4 screens

Verdict

The call

The clearest difference is price: dp SmartController at Free against Transfer Function's $49.99. dp SmartController also leads on in-app purchases (none vs 1) and update cadence (every 3 months vs every 6 months). On 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

dp SmartController is free to download; Transfer Function costs $49.99 up front. Transfer Function sells 1 one-off in-app purchase. dp SmartController asks for nothing beyond the download.

UpkeepUpdate frequency

Transfer Function ships an update every 6 months, dp SmartController every 3 months. The most recent releases landed on September 24, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
Transfer Function versus dp SmartController: the parameters behind the verdict, then further details
ParameterTransfer Functiondp SmartController
Price$49.99Free — better
Rating3.0 (2 ratings) — better—
Positive reviews25.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size33 MB36 MB
Age rating4+17+
DeveloperAndrew SmithDongguan Benqing Electronic Technology Co., Ltd.

In-app purchases

1 purchases

Transfer Function

One-time1
  • Reference Curves Option$14.99
None

dp SmartController

No in-app purchases

Questions

Is Transfer Function free?
Transfer Function costs $49.99, and also offers in-app purchases.
Is dp SmartController free?
dp SmartController is free to download, with no in-app purchases.
Do Transfer Function or dp SmartController have ads?
Neither Transfer Function nor dp SmartController shows ads.
Which is updated more often, Transfer Function or dp SmartController?
Transfer Function ships an update every 6 months, and dp SmartController every 3 months. Most recently, Transfer Function was updated on September 24, 2026 and dp SmartController on October 4, 2026.

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