Pure Gas vs DEF Search
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pure Gas
Locate nearby stations offering ethanol-free gasoline. View a list sorted by distance or use the map to find stations anywhere. Track fuel mileage, trip distance, price, and type for each fill-up, assigning records to specific vehicles.
- Locate ethanol-free gas stations
- Sort stations by distance
- Map view for station discovery
- Track fuel mileage
- Record trip distance
- Log fuel price and type
- Assign fuel records to vehicles
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CORE LOCATION SERVICES MUST BE ENABLED Pure Gas is a simple front end app for the popular website pure-gas.org. You get a list of all ethanol-free gas stations sorted nearest to furthest. Just click on the one you like, and get driving directions! Use the map view and find a pure gas station anywhere you want to go! In addition to locating the nearest ethanol-free fuel station, you can track and save the following information into the iPhone at every fill-up! Fuel Mileage Trip Distance Fuel Price Fuel Type Assign fuel records to specific vehicles! For more information on Pure Gas, please visit pure-gas.org
DEF Search
Easily locate Diesel Exhaust Fluid (DEF) pumps nearby with an interactive map. Get directions, confirm station status, and contribute to keeping data accurate for all diesel vehicle owners.
- Interactive DEF pump locator map
- Search by address, city, or ZIP code
- Use current location for closest pump
- One-tap directions via Apple/Google Maps
- Confirm station status
- Report/suggest station updates
- Save favorite stations
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DEF Search is the fastest way to find Diesel Exhaust Fluid (DEF) pumps near you. Whether you're a long-haul trucker, fleet driver, RV traveler, or diesel pickup owner, running low on DEF shouldn't slow you down. DEF Search shows you nearby stations on a clean, easy-to-read map with addresses, descriptions, and one-tap directions in Apple Maps or Google Maps. WHY DEF SEARCH • Built for the road — large tap targets, fast map, minimal clutter • Crowd-sourced and verified — drivers like you keep the data fresh • Free to use — no subscriptions, no paywalls • Works in the USA and Canada — search by city, state, or current location KEY FEATURES • Interactive locator map of DEF pumps • Search by address, city, or ZIP code • Use your current location to find the closest pump • One-tap directions in Apple Maps or Google Maps • Confirm a station is still open and pumping • Report closed, moved, or incorrect locations • Suggest new stations to help other drivers • Save Favorite stations FOR TRUCKERS Skip the wrong-turn detours. Find DEF pumps before you exit the highway. FOR RV & DIESEL DRIVERS Plan refills along your trip and never get stranded with a DEF warning light. COMMUNITY POWERED Every confirmation, report, and suggestion makes the map better for the next driver. Help us build the most accurate DEF station directory on the road. PRIVACY FIRST We only use your location to show nearby stations and provide directions. No tracking, no selling your data. Download DEF Search and never hunt for diesel exhaust fluid again.
Screenshots
Verdict
The clearest difference is in-app purchases: DEF Search at none against Pure Gas's 1. DEF Search also leads on rating (5.0 vs 4.6) and update cadence (every 9 days vs every 5 months). Pure Gas's advantage is ratings volume (2.9K vs 1). On price, ads and device support 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. Pure Gas sells 1 one-off in-app purchase. DEF Search asks for nothing beyond the download.
DEF Search holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Pure Gas has 2.9K ratings behind it against 1, so its average is the more settled of the two.
Pure Gas ships an update every 5 months, DEF Search every 9 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.
| Parameter | Pure Gas | DEF Search |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.9K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 37.1% of reviews | — |
| Number of ratings | 2.9K — better | 1 |
| Update frequency | Every 5 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeffrey Jackson | David Brownlow |
Customer experience
Pure Gas
DEF Search
Bugs and requests
Pure Gas
Reported bugs
2 issues- App crashes or won't open
- Map view issues, such as incorrect station locations
Requested features
4 requests- Add fuel pricing information
- Allow searching/browsing outside of current location
- Display octane levels for each station
- Enable user reviews/comments on stations
DEF Search
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Pure Gas
- Developer Tip$0.99
DEF Search
No in-app purchases









