Comparison

Level3D vs Echo

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

Head to head
About

Level3D

This utility app offers a suite of leveling tools, including bubble level, roof pitch, and grade measurement. It leverages an orientation device for advanced functions like dual bubble levels and beam distortion.

Highlights
  • Bubble Level
  • Roof Pitch
  • Grade Measurement
  • Cross Grade
  • Range of Motion Tracking
  • Dual Bubble Levels
  • Beam Distortion
Features
Read full description

Yes, the Hitch Pitch makes a great level too. Level3D is a tool box of leveling functions, that when used in conjunction with the Hitch Pitch orientation device, provides output that simplifies many leveling tasks. Level3D provides the following: Bubble Level Roof Pitch Grade Cross Grade Range of Motion tracking Level3D provides the following functions using two Hitch Pitches: Dual Bubble Levels Beam Distortion More to come Please leave a review if you have any suggestions for changes to current or even new tools you would like to see.

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/

Screenshots

Level3D4 screens
Echo4 screens

Verdict

The call

The clearest difference is in-app purchases: Level3D at none against Echo's 2. Echo's advantage is update cadence (every 9 days vs every 7 months) and 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. Level3D asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Level3D against 4.9 for Echo. 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.

UpkeepUpdate frequency

Level3D ships an update every 7 months, Echo every 9 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Level3D versus Echo: the parameters behind the verdict, then further details
ParameterLevel3DEcho
PriceFreeFree
Rating5.0 (1 ratings) — better4.9 (36 ratings)
Positive reviews—100.0% of reviews
Number of ratings136 — better
Update frequencyEvery 7 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size38 MB12 MB
Age rating4+4+
DeveloperJ2C Engineering LLCMark Garrison Jr.

Customer experience

Level3D

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Echo

All ratings35 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews20 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Level3D

No in-app purchases

2 purchases

Echo

Subscriptions2
  • Echo Pro Monthly$4.991 Month
  • Echo Pro Annual$39.991 Year

Questions

Is Level3D free?
Level3D is free to download, with no in-app purchases.
Is Echo free?
Echo is free to download, with in-app purchases available.
Which has better reviews, Level3D or Echo?
Level3D is rated higher. Level3D averages 5.0 out of 5 from 1 ratings, while Echo averages 4.9 from 36 ratings.
Do Level3D or Echo have ads?
Neither Level3D nor Echo shows ads.
Which is updated more often, Level3D or Echo?
Level3D ships an update every 7 months, and Echo every 9 days. Most recently, Level3D was updated on November 3, 2026 and Echo on November 5, 2026.

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