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65
BU Score
Solid

Double Lumen

5.0 ✍️ Editor
✍️ bumetric analysis

Double Lumen is an iOS app from Crystal Clear Solutions in the Education category, currently rated 5.0★ across 8 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Our BU Score puts it at 65: Solid (established niche player). For a Education app, that means established niche player.

Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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idle
0%
Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
0
since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 8 of 8 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Excellent rating (5.0★)METRIC
+$2,200
worth every pennyREVIEW
+$2,000
5 starREVIEW
+$1,800
Mature app (14y old)METRIC
+$1,500
highly recommendREVIEW
+$1,400
Single-language (English only)METRIC
−$400
Pre-traction phase (8 ratings)METRIC
−$300
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 88 MB🔞 17+📱 iOS 9.0+🔖 v3.31🔄 updated 5y ago🌐 EN📂 Education💰 Paid🚀 Launched 2011 (14y old)

📝 About this app

This is real video double lumen and bronchial blocker simulator.

As the chief of thoracic anesthesia I have noticed that residents and even some attendings have trouble recognizing correct DLT placement. The problem is that there are fewer teaching cases requiring DLTs than regular ETTs, and you usually have an impatient surgeon hovering around you, leaving you little time to visually process what you are seeing through the bronchoscope.

We have created a DLT simulator that takes the patient, surgeon and all constraints out of the equation, giving you all the time you need to learn this valuable skill. The simulator gives you a basic control set allowing you to push the DLT in, pull it out, change the viewable lumen and finally confirm when you think the position is correct. The simulator will let you know how you are doing.

The simulator starts with a basic teaching program, going over a full bronchoscopy exam. You can then view a correctly and incorrectly placed DLT. From this point you have access to 10 simulations, including bronchial blocker positioning. The first few simulation help walk you through the correct movement in order to properly seat and confirm the placement of the left-sided DLt. As you advance through the simulations, you are given more control over the positioning. The video images are real bronchoscopy images so you are seeing what you would actually visualize in the operating room.

A lot of time went into capturing and editing video images. Even more time went into developing an intelligent simulator to take into account the multiple choices one has when moving the DLT. The result is the first bronchoscopy simulator that gives you the realistic feeling of actually looking down the bronchoscope, performing the exam and manipulating the DLT or blocker all by yourself.

🆕 What's New · v3.31

updated for iOS 14

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
Double Lumen
Developer
Crystal Clear Solutions
Bundle ID
com.houseofficer.doublelumen
App Store URL
Open in App Store
Category
Education
Content rating
17+
Languages
EN

Company

Website
Not found
Tagline
Today
Description
Find apps and games for iPhone, iPad, Mac, and more on the App Store.
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
OG image

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$29.9K/mo
Top-grossing rank
Outside top 100 in US Education
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
Not found
Press / News
Not found

Contacts & Socials

Socials
Not found
Email
Not found
Phone
Not found
Contact page
Not found
About page
https://apps.apple.com/us/iphone/story/id1406503654
Recent App Store Reviews14 latest · avg 5.0★ · 100.0% 5★ · 0% 1★
5★
14 (100%)
4★
0 (0%)
3★
0 (0%)
2★
0 (0%)
1★
0 (0%)
+0 ratings/week
Praise: great ×3 best ×3 amazing ×3 excellent ×2 recommend ×1
Top positive
★★★★★ I've waited for this one!
This app has been long overdue. Finally I can practice double lumen tubes as often as I need. The app is interactive, and allows you to manipulate the scope. The video images change according to your choices. The video images are real, …
★★★★★ Great app for anesthesia residents.
Great for learning.…
Top negative
★★★★★ A great app, only one of its time!
Recommend for anyone wanting practice with DLT placement!!…
★★★★★ Best anesthesia app ever
If you want to learn how to use a double lumen tube and troubleshoot it, but don't get a lot of experience in the OR this is the app you need! Worth every penny.…
📈Ratings growth8 ratings+300% lifetimeShow 3-year history estimate ▾Sep 2011Jun 2024May 2026
Tracked (13 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

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Full revenue analysis
Read the article-style breakdown for Double Lumen: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
Read deep-dive →