Level3D vs Echo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Bubble Level
- Roof Pitch
- Grade Measurement
- Cross Grade
- Range of Motion Tracking
- Dual Bubble Levels
- Beam Distortion
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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.
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.
- 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
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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" and called it an app he has "loved using." Designed for radio enthusiasts and curious listeners alike, Echo is a powerful aggregator that connects you to over 2,000 community-hosted Software Defined Radio (SDR) receivers and OpenMHz archives. By integrating these reliable streams into a dedicated native environment, Echo delivers true background audio, high-performance mapping, and features impossible to achieve with 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 2,000+ 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 & OpenMHz Automatically cycle through station lists at set intervals. Listen directly to public safety, fire, and EMS radio systems via vast OpenMHz archives. 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 100% 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 servers, and no ad IDs. Your logs and favorites remain stored locally on your device. Echo Pro recording sync uses 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 • Every button, control, and station card announces 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
Verdict
The clearest difference is update cadence: Echo at every 9 days against Level3D's every 7 months. Echo also leads on ratings volume (32 vs 1). On price, rating, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Level3D against 5.0 for Echo. That said, the two scores are not equally well evidenced: Echo has 32 ratings behind it against 1, so its average is the more settled of the two.
Level3D ships an update every 7 months, Echo every 9 days. The most recent releases landed on September 7, 2026 and September 25, 2026 respectively.
| Parameter | Level3D | Echo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (32 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 32 — better |
| Update frequency | Every 7 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | J2C Engineering LLC | Mark Garrison Jr. |
Customer experience
Level3D
Echo
In-app purchases
Level3D
No in-app purchases
Echo
No in-app purchases





