Best Drug Checking Apps

250+ iOS apps curated and reviewed

4.2 avg rating
20 free apps
Updated September 2026

Looking for free drug checking apps? 20 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Drug Checking Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1KnowDrugs Drug CheckingKnowDrugs Drug CheckingFree4.7★ (38)NoYesSep 2026
2CheckDECCheckDECFree5.0★ (7)NoNoMay 2026
3Drug Interactions Checker -MedDrug Interactions Checker -MedFree—NoNoAug 2026
4Drug Test InfoDrug Test InfoFree3.0★ (2)NoNoMay 2026
5Drug AI - Safety ChecksDrug AI - Safety ChecksFree—NoYesMay 2026
6MobileDetectMobileDetectFree4.4★ (25)NoNoAug 2026
7UpToDateUpToDateFree3.6★ (579)NoNoSep 2026
8MDCalc Medical CalculatorMDCalc Medical CalculatorFree4.9★ (52K)NoNoSep 2026

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FAQ about Drug Checking

What are the best drug checking apps for iPhone?
KnowDrugs Drug Checking tops our drug checking apps ranking as of September 2026, with a 4.7-star average from 38 App Store ratings, and it's free to download.
Yes — 20 of the top drug checking apps we rank are free to download, including KnowDrugs Drug Checking and CheckDEC.
KnowDrugs Drug Checking has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ drug checking apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
KnowDrugs helps users access drug testing results, pill warnings, and drug alerts. It provides educational information on over 200 drugs, along with advice on harm reduction and safer use practices to minimize potential risks associated with substance consumption.
The app offers profiles for over 200 drugs, including stimulants like MDMA and amphetamine, depressants such as alcohol and benzodiazepines, and psychedelics like 2C-B, LSD, and DMT. This information covers wanted and unwanted effects, duration, interactions, and risks.

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