Comparison

Echo vs EVTV Controller

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

Head to head
About

Echo

Tune into thousands of remote radio servers worldwide from your iPhone or iPad. Explore shortwave broadcasts, aviation communications, and more with a global interactive map and advanced tuning features. Enjoy uninterrupted background audio and a privacy-first experience.

Highlights
  • Global interactive map and search
  • Support for multiple SDR architectures
  • Scanner mode and OpenMHz archives
  • Pro-level tuning and analytics
  • Offline frequency library and logging
  • Uninterrupted background audio
  • Privacy-first design
Features
Read full description

Echo is the ultimate, natively-built iOS client for tuning into remote radio servers. Listen to anything, from anywhere. Dive into international shortwave broadcasts from Asia, monitor aviation communications over the Atlantic, discover mysterious numbers stations, or tune into distant FM stations across the globe, all from your iPhone, iPad, or Mac with Apple silicon. Featured in Radio World, on RTL-SDR.com, and in the SWLing Post. Radio World's Nick Langan praised Echo's "thoughtfully designed interface," said he has "loved using" the app, and later described Echo Pro's transcription as "very responsive." Designed for radio enthusiasts and curious listeners alike, Echo is a powerful aggregator that connects you to nearly 3,000 community-hosted Software Defined Radio (SDR) receivers. By integrating these reliable streams into a dedicated native environment, Echo delivers true background audio, high-performance mapping, and features that are difficult to achieve in a standard web browser. KEY FEATURES Global Interactive Map & Search Visually browse thousands of remote SDR servers worldwide using our smooth, native MapKit clustering engine, or instantly search nearly 3,000+ receivers by name or location. Unmatched SDR Compatibility Seamless support for KiwiSDR, OpenWebRX, WebSDR, and FM-DX Webserver architectures. Want to listen to a private node? Add your own unlisted servers with custom URL entry. Scanner Mode Automatically cycle through station lists at set intervals. Advanced Tuning & Analytics • Smart Manual Tuner: Instantly tune by entering kHz or MHz; Echo intelligently detects the band format. • Audio Engine Passthrough: Interfaces directly with server-side signal processors for broad compatibility with waterfall rendering, plugins, and decoding extensions. • Intelligent Profile Switching: Automatically switches to the correct server band profile as you tune on supported networks. Offline Frequency Library & Logging Search an offline, built-in EIBI database of over 9,000 global shortwave and utility frequencies. Save and log your favorite stations to your local device. Uninterrupted Background Audio Keep listening when your screen is locked or while using other apps. Our custom audio bridge intercepts complex SDR streams to provide true iOS background playback and lock-screen controls. ECHO PRO Take Echo further with recording, live transcription, translation, and iCloud sync. • Record the Airwaves: Record live radio and revisit important moments anytime. • Live Transcription: Turn live radio into on-screen text as you listen. • Translation: Transcribe foreign-language broadcasts and translate them into readable English. • iCloud Sync: Sync recordings, transcripts, translations, notes, favorites, saved servers, and supported settings across your Apple devices. Echo Pro requires a monthly or annual subscription. Privacy First Zero tracking. No analytics, no proprietary tracking servers, and no ad IDs. Your listening activity is not tracked. Echo Pro syncs supported data through your private iCloud account. Built with speed, aesthetics, and privacy in mind, Echo ensures a fast, premium listening experience. Start exploring the airwaves today! VoiceOver & Accessibility Support • Station cards, player, recording, and scanner controls announce meaningful context to VoiceOver • Scanner controls (play/pause/skip/favorite) are fully labeled and navigable • Station changes, server connections, and scanner state are announced in real-time • Reduce Transparency support: glass effects swap to solid backgrounds when enabled • Reduce Motion support: animations are simplified when enabled in iOS settings • Decorative elements hidden from assistive technology for a cleaner navigation experience Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

EVTV Controller

Monitor, diagnose, and manage your EVTV Battery Module Controller in real-time. View pack status, cell health, energy statistics, and perform advanced diagnostics. Requires an EVTV battery controller with WiFi and a compatible Tesla battery pack.

Highlights
  • Real-time pack status monitoring
  • Individual cell voltage mapping
  • Energy statistics and cycle estimation
  • Advanced diagnostics console
  • State of charge, voltage, and current tracking
Features
Read full description

Control the Controller! Use the EVTV app to monitor, diagnose, and manage the EVTV Battery Module Controller. Enter the controller UDP port in settings and press reconnect to obtain data. -Real-Time Pack Status View state of charge, pack voltage, current flow, and power consumption at a glance. Track your battery's temperature and 12V auxiliary system voltage to ensure optimal operating conditions. -Individual Cell Map See all cells organized with color-coded voltage displays. Quickly identify cell imbalances and monitor pack health with high/low/average cell statistics and delta voltage tracking. -Energy Statistics Track lifetime energy throughput and estimate battery cycles. Monitor current session energy flow and get time-to-empty or time-to-full estimates based on real-time power consumption. -Advanced Diagnostics Access the built-in console for direct communication with your EVTV controller for full pack control. For advanced users only. Please consult the manual for a full set of commands. Requirements - EVTV battery controller with WiFi - Tesla Model S3XY battery pack or Modules. - Device must be on the same WiFi network as the controller. For remote access, we suggest a VPN like Tailscale. Remote access in development.

Screenshots

Echo4 screens
EVTV Controller4 screens

Verdict

The call

The clearest difference is in-app purchases: EVTV Controller at none against Echo's 2. EVTV Controller also leads on iOS requirement (15.1 vs 17.0). Echo's advantage is ratings volume (36 vs 1). On price, rating, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Echo sells 2 in-app purchases, starting at $4.99 per month. EVTV Controller asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Echo against 5.0 for EVTV Controller. That said, the two scores are not equally well evidenced: Echo has 36 ratings behind it against 1, so its average is the more settled of the two.

Scorecard3 real differences · 7 level
Echo versus EVTV Controller: the parameters behind the verdict, then further details
ParameterEchoEVTV Controller
PriceFreeFree
Rating4.9 (36 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings36 — better1
Update frequencyEvery 9 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size12 MB14 MB
Age rating4+4+
DeveloperMark Garrison Jr.EVTV Motor Verks

In-app purchases

2 purchases

Echo

Subscriptions2
  • Echo Pro Monthly$4.991 Month
  • Echo Pro Annual$39.991 Year
None

EVTV Controller

No in-app purchases

Questions

Is Echo free?
Echo is free to download, with in-app purchases available.
Is EVTV Controller free?
EVTV Controller is free to download, with no in-app purchases.
Which has better reviews, Echo or EVTV Controller?
EVTV Controller is rated higher. Echo averages 4.9 out of 5 from 36 ratings, while EVTV Controller averages 5.0 from 1 ratings.
Do Echo or EVTV Controller have ads?
Neither Echo nor EVTV Controller shows ads.

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