Comparison

EyeSound Vocal vs MemFlow

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

Head to head
About

EyeSound Vocal

Features
Read full description

EyeSound Vocal converts spoken words and other sounds into data rich images. These are seen in an active spectrogram displayed on the screen of your device. Latency of sound-to-image is less than 100 milliseconds. The spectrogram can be tuned by the user so that images of most spoken words are recognizable and are unique. If one has memorized a good sized vocabulary of word images, there can be some visual comprehension of spoken conversations just from viewing the app's spectrogram. Details in the spectrograms indicate inflection and volume. Applications/uses: - entertainment - watch as sounds and conversations morph into image streams - art - create and download spectrogram images that correspond to spoken phrases or other sounds ------------------------------------------------ NOTE: EyeSound Vocal does not capture medical data and does not provide health related measurements, diagnoses or treatment advice. It is not intended for use as a tool for treatment of medical conditions. It is not intended for use as a tool for scientific measurements. ------------------------------------------------ User adjustable parameters in the app include the rate at which sonogram images progress across the screen, resolution, colors, color switching and color mapping to sound intensity, high frequency boost. Features include auto gain, display of saved images next to active or paused spectrogram, pause/resume for capture of images, save/recall of images, save/recall of setup parameters, default parameter setup that is well suited to the visualization of human speech. full screen mode for a view of nothing but the active, or paused, spectrogram. How the app works: Sound is captured by your device's microphone. The app processes the sound data in small sized packets. For each packet the app computes frequencies and intensities. A spectrogram is created by color mapping intensities across frequency bins and then plotting these versus time. With ongoing plotting of packet data as it arrives the spectrogram becomes 'active' - it appears as a movie. EyeSound - Past, Present, Future: 45 years ago, in 1979, a young chemical engineer fresh out of MIT had just begun working for GE in Niskayuna, NY. In his spare time he built and experimented with breadboarded circuits that incorporated resistors and capacitors, transistors and ICs and lights, microphones and speakers. One day he assembled a device consisting of a row of LEDs tied into a circuit that would sequentially light the LEDs in accordance with an input voltage signal. When he manually swept this device in an arc he saw - very much to his surprise and to his fascination - images of complex waveforms painted across empty air. This simple device was giving a glimpse of all of the information that was normally only heard! The engineer had found a mission: improve upon the device to open to the world a whole new dimension of visual perception. A team of 2 of us - the engineer and the coder - have over the past several months turned the concept into an app. The initial release is happening now. The 45 year old mission is on the verge of realization. We anticipate releasing new versions of the EyeSound Vocal app on a regular basis. Users - please send us your suggestions and we'll use them as direction for improvements and use them to expand on our user tips. We will be taking a look into interfacing EyeSound with two types of peripheral devices (1) AR glasses which could put the active spectrogram front and center in your field of view - so that while viewing the spectrogram you will be more in the same world with the people around you; (2) wearable, directional and better quality microphones to avoid the pick up of background sounds that at times obscure the visualizations.

About

MemFlow

Features
Read full description

Human memory is naturally fading, but MemFlow ensures your moments last forever. MemFlow isn't just a simple voice recorder—it is your personal "Audio Memory Engine," designed to securely capture, log, and retrieve the soundscapes of your life. Whether it’s an unpredictable brainstorming session you wish you had recorded, the laughter of a loved one, or a day-long conference, our memory-first continuous loop recording guarantees you never lose the audio that matters. Why MemFlow? The "Memory-First" Approach: · The "Memory Loop" Archiving: Let the app securely run in the background as your daily safety net. Our crash-safe loop engine works tirelessly so you never have to say, "I wish I had recorded that memory." · Life Logging & Audio Journaling: Stop relying solely on fading human recollection. Create a permanent, warm sonic archive of your daily life. Effortlessly look back, listen, and retrieve the exact feelings of your past memories anytime. · Meeting & Lecture Focus: Record hours of audio without stressing over storage limits or unexpected app crashes. Built for dependable knowledge retention by students and professionals. · Instant Memory Capture: Quick, single-tap ambient recording right from the Lock Screen via Live Activities when unpredictable inspiration strikes. Key Features Built For Retention: · Indestructible Memory Vault: Crash-safe, high-quality audio capture optimized for long sessions and sustained background processing, ensuring zero data loss. · AirPods Portable Memory Device: Full support for AirPods audio routing seamlessly turns your wireless earbuds into a wearable, real-time life-logging recorder, capturing inspiration wherever you go. · Interactive Live Activities: Keep a pulse on your active memory recording directly from the Lock Screen or Dynamic Island with a beautiful bouncing audio visualizer. · Visual Memory Feed (Timeline): Navigate your past with crystal clarity through an elegantly designed, auto-scrolling timeline feed of all your retained memories. · Seamless Export & Cleanup: Intelligent background processing ensures your audio memories are securely saved to local storage while device memory is automatically managed, without interrupting your thought process. · Glass-blur Premium Aesthetic: Reviewing your memories should be a pleasure. Enjoy a modern, serene UI with satisfying micro-interactions that brings joy to memory retrieval. Capture your world. Retain your memories. Let it flow.

Screenshots

EyeSound Vocal4 screens
MemFlow3 screens

Verdict

The call

The clearest difference is update cadence: MemFlow at daily against EyeSound Vocal's every 3 weeks. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EyeSound Vocal ships an update every 3 weeks, MemFlow daily. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

Scorecard1 real difference · 5 level
EyeSound Vocal versus MemFlow: the parameters behind the verdict, then further details
ParameterEyeSound VocalMemFlow
PriceFreeFree
Update frequencyEvery 3 weeksDaily — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size3 MB8 MB
Age rating4+4+
Developerkeith house加康 王

In-app purchases

None

EyeSound Vocal

No in-app purchases

None

MemFlow

No in-app purchases

Questions

Is EyeSound Vocal free?
EyeSound Vocal is free to download, with no in-app purchases.
Is MemFlow free?
MemFlow is free to download, with no in-app purchases.
Do EyeSound Vocal or MemFlow have ads?
Neither EyeSound Vocal nor MemFlow shows ads.
Which is updated more often, EyeSound Vocal or MemFlow?
EyeSound Vocal ships an update every 3 weeks, and MemFlow daily. Most recently, EyeSound Vocal was updated on November 8, 2026 and MemFlow on November 9, 2026.

Other comparisons