Added: Calculators for Aortic Valve Area (Continuity), Stroke Volume & CO (LVOT), E/e′ Ratio, RVSP Estimate, Bernoulli Gradient, A–a Gradient Updated: Calculator descriptions Updated: Restructured cardiac equations section Updated: Ultrasound physics and hemodynamic equations Updated: User interface fixes throughout the app Updated: Matomo SDK to 7.8.0

Added: Hemodynamic and ultrasound equations Added: Highlighting text when searching Added: Slide to favorite or unfavorite calculations Added: iPad interface Update: Reduced boilerplate code Update: Fixed native mitral stenosis values Update: Restructured changelog scheme Update: More subtle liquid glass for references

Updated: Complete re-write of the codebase to transition from Storyboard to SwiftUI Updated: Conform elements to iOS 26's liquid glass user interface

⁃ Added: Paravertebral nerve block video ⁃ Updated: Lossless compression of all media elements ⁃ Updated: Rewrote codebase to utilize single structured tuple-based arrays, eliminate unnecessary UI updates, streamline switch statements, etc. - Overall, EchoTools' compressed binary size decreased from 208.8 MB (version 5.4) to 84 MB (version 5.5).

⁃ Added: Dilated coronary sinus (PLSVC) TEE video ⁃ Updated: Matomo framework, consistency across strings

⁃ Added: Navitor and Evolut-R TAVR valves ⁃ Added: Pulmonary velocity acceleration time (PVAT) ⁃ Added: Concentric LVH, aortic dissection flap fenestration, and quadricuspid aortic valve TEE videos ⁃ Updated: TAVR valve information

⁃ Added: Air bronchograms, cardiac standstill, and transhepatic IVC POCUS videos ⁃ Added: Septal myectomy and P2 restriction (type III) TEE videos ⁃ Updated: 3D TEE tricuspid valve video, 3-point compression ultrasound for lower extremity DVT video

⁃ Added: Proximal lower extremity DVT compression, left pleural effusion, and Tetralogy of Fallot POCUS videos ⁃ Added: Perceval sutureless aortic valve ⁃ Added: Edwards Mitris bioprosthetic mitral valve ⁃ Added: SVC collapsibility index

- Added: 3D TEE mitral annular calcification (MAC), serratus plane block, spinal cord TEE, and type B dissection POCUS videos ⁃ Added: IVC distensibility index (DI) ⁃ Updated: IMH TEE video, D-Sign POCUS video, IVC POCUS video

⁃ Added: Femoral vascular, gastric, apical long-axis, apical two-chamber, apical five-chamber, and suprasternal aortic arch POCUS videos ⁃ Updated: POCUS subcostal TTE video

- Added: LV diastology image for IVRT - Added: Libman-Sacks endocarditis TEE video - Added: Lung point and “D-sign” POCUS videos

- Added: Calculators for regurgitant lesions (Valves → Native Valves → click top right calculator icon) - Added: Ebstein’s anomaly POCUS video - Added: Subclavian vein/artery vascular video - Added: Mitral valve leaflet perforation and primum ASD TEE videos

⁃ Added: Medtronic Avalus aortic valve ⁃ Added: RVAD MCS TEE video ⁃ Added: Pecto-Intercostal Fascial Block (PIFB) video ⁃ Updated: Combined Links and Sources

⁃ Added: Autosomal dominant polycystic kidney disease (ADPKD) POCUS video ⁃ Updated: Fixed AVPlayerViewController controls on videos ⁃ Updated: Standardized auto-layout constraints ⁃ Updated: Updated deprecated code for the in-app Review system

⁃ Added: Prosthesis Evaluation section for Prosthetic Valves ⁃ Added: Matomo SDK Integration (removed Firebase) ⁃ Updated: Higher resolution icons with lossless compression ⁃ Updated: Popups for references ⁃ Updated: Transitioned from CocoaPods to Swift Package Manager

⁃ Added: Pop-up framework containing references for prosthetic valve sections ⁃ Updated: Aortic, mitral, and tricuspid bioprosthetic valve information

- Added: Ross procedure and intracardiac clot TEE videos - Added: Right heart catheterization (RHC) video - Added: Adductor canal peripheral nerve block video - Updated: Coronary angiography section - Updated: Standardized video sizes - Updated: UIButton to UIImageView elements under the Anatomy tab

⁃ Added: Coronary angiogram section (still under construction) ⁃ Added: Midesophageal left atrial appendage (LAA) and 5 chamber view videos ⁃ Updated: Changed autoresizing masks throughout the application to improve compatibility with smaller iPhones screen sizes

⁃ Added: Midesophageal ascending aorta (long/short axis), upper esophageal aortic arch (long/short axis), transgastric right ventricular inflow, and a few transgastric tricuspid TEE videos ⁃ Updated: Table icons for References tab

Added: Midesophageal 2 chamber TEE video Added: Aortic intramural hematoma, fungal endocarditis, subaortic membrane, and paravalvular leak videos Updated: Combined “References” and “About” tabbed menu bar content to clean up the interface Updated: Prosthetic valve image transparency

Added: Gallbladder and spleen (left upper quadrant) abdominal POCUS videos Added: New video framework to allow videos to be expanded and viewed in landscape orientation Added: Thumbnail icons to menus Added: Option to click on valve images to expand Updated: User interface elements

Added: Ocular POCUS exam Updated: About section to utilize picker view UI element Updated: Beginning Equations section under References

- Added: Carcinoid tricuspid valve, diaphragm M-mode POCUS, and abnormal bubble study videos - Updated: TAPSE and tricuspid regurgitation images

- Added: References section (with sections for equations and links, both still under development) - Added: Separate sections for “About” - Author, Changelog, Contribute, Disclaimer & Terms, and References - Added: Images for PI jet and RA minor axis - Updated: Tab bar and social media icons

- Added: Initial dark mode framework - Added: IJ clot and color 3D GlassVue aortic valve videos