Go Narrow: Antibiotics Game
by Johanna Galaski
- Education
- Paid
- Small & simple · 100
- Rating
- 5.0
- 3 ratings · US storefront
- Top 100%among 144 Education apps
- Last update
- Oct 19, 2026
- Version 1.5
- Size
- 4 MB
- Category
- Education
- Tracked since
- Oct 11, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
I'm a microbiology resident, and ever since I studied antibiotics in medical school I've been thinking about how antibiotic coverage could be taught in a fun way. Many medical students, and residents too, really struggle with it. Go Narrow is my answer: a game that teaches which antibiotics cover which bacteria, and why.
Each level is a culture plate. Tap the bacteria your antibiotic covers, leave the ones it doesn't, and use the culture result to choose the narrowest drug that works. Every wrong tap tells you why in one sentence: an enzyme destroys the drug, its target has changed, or the drug can't get in. The pairs you get wrong come back for review until they stick.
Target lessons animate the mechanism of action, from the cell wall and membrane to the ribosome, DNA gyrase and folate synthesis. Resistance lessons show how bacteria fight back: MRSA, VRE, ESBL, AmpC, carbapenemases and CRAB.
In the Lab you learn Gram staining step by step and train your eye for morphology: Klebsiella are Gram-negative rods, staphylococci Gram-positive cocci in clusters, streptococci Gram-positive cocci in chains.
For learning only: real prescribing depends on local resistance, the site of infection and the patient, so always follow your local guidelines.
What’s new
Release notes for the latest version, as written by the developer.
- Night Shift leaderboards: Finish Today's shift and see your rank, challenge your colleagues
- Culture results: in some levels the culture comes back while you play, and you choose the drug to narrow to.
- Antibiogram levels: read the antibiogram, name the resistance enzyme, then narrow the therapy.
- Leave the map alone for a moment and see what your bug gets up to.
Rank history
Daily position in the Canada charts. #1 is at the top.
- Best rank
- #10
- Current rank
- #21
- Days charting
- 6 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
100/100
Small & simple
- Developer size100% · 25
Developer: 1 app on the charts
- Audience size100% · 20
Ratings: 3
- App size100% · 10
Size: 4 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #1, 10 countries
An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2
How the score worksVersion history
- 1.5LatestReleased Oct 19, 2026
- 1.1Released Oct 10, 2026