MedForge / Apps / GI Tract Tour
GI Tract Tour
Follow the meal. Sort it by station.
Follow a meal down the digestive tract. Drag enzymes, hormones, nutrients, diseases and drugs to the station where they act, then solve clinical cases from the story.
Free preview: level 1, twelve cards and a clinical case. Unlock levels 2 and 3. $2.99/month or $19.99/year
Live demo of GI Tract Tour
Try it: sort the card onto its station
Click the card's station on the map. A first miss gives a hint, a second miss shows the answer. These are the 12 cards of the free level.
A real screen from GI Tract Tour
From the iPhone app, in a pre-release build. The Android app follows the same design, and the text size can be changed from 40% to 300% on every screen.

Every fact in this app is cited
These are the references this app draws on. Inside the app, each answer links to its source in a reading window that keeps your place.
- Nitrostat (nitroglycerin) prescribing informationNLM DailyMed (FDA-approved prescribing information) · FDA label / NLM DailyMed
- Creon (pancrelipase) prescribing informationNLM DailyMed (FDA-approved prescribing information) · FDA label / NLM DailyMed
- Lialda (mesalamine) prescribing informationNLM DailyMed (FDA-approved prescribing information) · FDA label / NLM DailyMed
- Nexium (esomeprazole magnesium) prescribing informationNLM DailyMed (FDA-approved prescribing information) · FDA label / NLM DailyMed
- Salagen (pilocarpine hydrochloride) prescribing informationNLM DailyMed (FDA-approved prescribing information) · FDA label / NLM DailyMed
- Achalasia (MedlinePlus Medical Encyclopedia)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Celiac DiseaseNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Colorectal CancerNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Crohn's DiseaseNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Diverticulosis and DiverticulitisNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Esomeprazole (MedlinePlus Drug Information)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Gallbladder DiseasesNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- GERD (Gastroesophageal Reflux Disease)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- HemorrhoidsNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Hirschsprung disease (MedlinePlus Medical Encyclopedia)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Mesalamine (MedlinePlus Drug Information)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- PancreatitisNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Vitamin B12 deficiency anemia (MedlinePlus Medical Encyclopedia)National Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Peptic UlcerNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Sjögren's SyndromeNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Ulcerative ColitisNational Library of Medicine, MedlinePlus · NIH / NLM MedlinePlus
- Screening Tests to Detect Colorectal Cancer and PolypsNational Cancer Institute (NIH) · NCI / NIH
- Barrett's EsophagusNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Symptoms & Causes of Celiac DiseaseNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Crohn's DiseaseNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Diverticular DiseaseNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Symptoms & Causes of GallstonesNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Symptoms & Causes of GER & GERDNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- HemorrhoidsNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Hirschsprung DiseaseNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Symptoms & Causes of PancreatitisNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Symptoms & Causes of Peptic Ulcers (Stomach or Duodenal Ulcers)National Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Your Digestive System & How it WorksNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Ulcerative ColitisNational Institute of Diabetes and Digestive and Kidney Diseases (NIH) · NIDDK / NIH
- Iron-Deficiency AnemiaNational Heart, Lung, and Blood Institute (NIH) · NHLBI / NIH
- Coeliac disease: recognition, assessment and management (NG20)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Crohn's disease: management (NG129)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Gallstone disease: diagnosis and management (CG188)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Gastro-oesophageal reflux disease and dyspepsia in adults: investigation and management (CG184)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Pancreatitis (NG104)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Ulcerative colitis: management (NG130)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Dry MouthNational Institute of Dental and Craniofacial Research (NIH) · NIDCR / NIH
- Sjögren's DiseaseNational Institute of Dental and Craniofacial Research (NIH) · NIDCR / NIH
- 23.6 Accessory Organs in Digestion: The Liver, Pancreas, and GallbladderOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- 23.7 Chemical Digestion and Absorption: A Closer LookOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- 23.5 The Small and Large IntestinesOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- 23.3 The Mouth, Pharynx, and EsophagusOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- 23.2 Digestive System Processes and RegulationOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- 23.4 The StomachOpenStax, Rice University (peer-reviewed open textbook) · OpenStax (Rice University)
- AchalasiaStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Vitamin B12 DeficiencyStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Barrett EsophagusStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, BileStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, CarbohydratesStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Biochemistry, CholecystokininStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Celiac DiseaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Acute CholecystitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Colon CancerStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Crohn DiseaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, DefecationStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, DigestionStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- DiverticulosisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Duodenal UlcerStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, EsophagusStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, GastrinStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Gastric UlcerStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Gastroesophageal Reflux Disease (GERD)StatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Internal HemorrhoidStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Hirschsprung DiseaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Helicobacter PyloriStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Biochemistry, Iron AbsorptionStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, Large IntestineStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, Lower Esophageal SphincterStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Biochemistry, LipaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Mesalamine (USAN)StatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, PancreasStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Acute PancreatitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Pancrelipase TherapyStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, PepsinStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Pernicious AnemiaStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Peyer PatchesStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Proton Pump Inhibitors (PPI)StatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Anatomy, Abdomen and Pelvis, RectumStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Histology, Salivary GlandsStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, SecretinStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Sjogren DiseaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Anatomy, Abdomen and Pelvis, Small IntestineStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, StomachStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Ulcerative ColitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- XerostomiaStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- AppendicitisMedlinePlus, National Library of Medicine · NIH / NLM MedlinePlus
- CirrhosisMedlinePlus, National Library of Medicine · NIH / NLM MedlinePlus
- Eosinophilic EsophagitisMedlinePlus, National Library of Medicine · NIH / NLM MedlinePlus
- Hereditary hemochromatosis (MedlinePlus Genetics)MedlinePlus Genetics, National Library of Medicine · NIH / NLM MedlinePlus
- Wilson disease (MedlinePlus Genetics)MedlinePlus Genetics, National Library of Medicine · NIH / NLM MedlinePlus
- Loss of brain function - liver disease (MedlinePlus Medical Encyclopedia)MedlinePlus Medical Encyclopedia, National Library of Medicine · NIH / NLM MedlinePlus
- Hepatitis BMedlinePlus, National Library of Medicine · NIH / NLM MedlinePlus
- Lactose IntoleranceMedlinePlus, National Library of Medicine · NIH / NLM MedlinePlus
- AppendicitisNIDDK, National Institutes of Health · NIDDK / NIH
- CirrhosisNIDDK, National Institutes of Health · NIDDK / NIH
- Dumping SyndromeNIDDK, National Institutes of Health · NIDDK / NIH
- GastroparesisNIDDK, National Institutes of Health · NIDDK / NIH
- HemochromatosisNIDDK, National Institutes of Health · NIDDK / NIH
- Irritable Bowel Syndrome (IBS)NIDDK, National Institutes of Health · NIDDK / NIH
- Lactose IntoleranceNIDDK, National Institutes of Health · NIDDK / NIH
- Primary Biliary Cholangitis (Primary Biliary Cirrhosis)NIDDK, National Institutes of Health · NIDDK / NIH
- Wilson DiseaseNIDDK, National Institutes of Health · NIDDK / NIH
- Irritable bowel syndrome in adults: diagnosis and management (CG61)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- Clostridioides difficile infection: antimicrobial prescribing (NG199)National Institute for Health and Care Excellence (NICE) · NICE (UK)
- AppendicitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Physiology, BilirubinStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Clostridioides difficile infectionStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Hepatic CirrhosisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Dumping SyndromeStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Eosinophilic EsophagitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Fecal IncontinenceStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- GastroparesisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Hepatic EncephalopathyStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- HemochromatosisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Hepatitis BStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Irritable Bowel SyndromeStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Lactose IntoleranceStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- NitratesStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Primary Biliary CholangitisStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Short Bowel SyndromeStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Wilson DiseaseStatPearls Publishing, National Library of Medicine (NCBI Bookshelf) · NIH / NLM
- Hepatitis B (fact sheet)World Health Organization · WHO