Best C4A Apps

249+ iOS apps curated and reviewed

4.6 avg rating

20 free apps

Updated November 2026

The best c4a apps on iPhone average 4.6★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated November 2026.

Compare top C4A Apps (November 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Click4Appointment	Free	—	No	No	Oct 2026
2	C4A	Free	5.0★ (1)	No	Yes	Oct 2026
3	C4A Conference 2026	Free	—	No	No	Oct 2026
4	Rythm Health	Free	4.6★ (40)	No	No	Oct 2026
5	iHerb: Vitamins & Supplements	Free	4.8★ (179K)	No	No	Nov 2026
6	MyLabcorp	Free	4.8★ (107K)	No	No	Nov 2026
7	BioLife Plasma Services	Free	2.6★ (3.8K)	No	No	Oct 2026
8	Rowe Casa	Free	4.9★ (21)	No	No	Oct 2026

Top Picks for C4A

#1

Click4Appointment by Dynamicbit Technologies Private Limited

Find Doctors/Book Appointments

Editor's Choice

0.0(0 ratings)

Free

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#2

C4A by 思辰吴

Caddies for amateur

Strong Contender

5.0(1 ratings)

FreeIn-App Purchases

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This AI-powered golf application offers real-time GPS distances to course features and personalized club analytics. It provides automatic strategy and club suggestions for every shot, enhancing your game. A subscription unlocks all advanced features, with a free trial available.

#3

C4A Conference 2026 by California Association of Area Agencys on Aging

Worth Considering

0.0(0 ratings)

Free

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More C4A apps to explore

The World’s Easiest Blood Test

Take control of your health with at-home blood testing. This platform offers painless sample collection, advanced lab analysis, personalized insights, and an AI coach to help you understand your body's changes over time. Track key biomarkers for heart health, hormones, thyroid, and more.

Painless at-home blood collectionAdvanced laboratory testingPersonalized health insights

💪 Health & Fitness

iHerb: Vitamins & Supplements

iHerb: Vitamins & Supplements

iHerb: Vitamins & Supplements

The Place to Shop for Wellness

Shop a wide selection of health and wellness products, including vitamins, supplements, sports nutrition, beauty, and self-care items. Enjoy exclusive app discounts, rewards for sharing, and guaranteed quality from trusted brands. Get fast delivery and easy returns.

Exclusive app discountsRewards program for savingsShop trusted national brands

🛍️ Shopping

free with in-app purchases

Lab Results & Patient Portal

Manage your health conveniently with this app. Find and schedule lab appointments, check in remotely, and receive notifications for your results and bills. View, download, and pay for reports, and manage multiple accounts.

Find and schedule lab appointmentsRemote check-in via QR codeReceive notifications for results and bills

BioLife Plasma Services

BioLife Plasma Services

BioLife Plasma Services

Let’s work Arm-In-Arm!

Easily schedule plasma donation appointments, track your reward payments, and discover exclusive promotional offers. Stay informed about your donation progress and refer friends to earn bonuses. This app simplifies the process of contributing to life-saving therapies.

One-click appointment schedulingView reward payment balanceAccess payment history

Discover trusted natural wellness essentials for your home and family. Shop a wide collection of safe, non-toxic products crafted with high-quality ingredients. Enjoy exclusive app benefits like discounts, personalized offers, and loyalty rewards.

Shop natural wellness productsExclusive app-only discountsPersonalized offers and notifications

🛍️ Shopping

Health & Nutritional Insights

Gain personalized health insights based on your unique microbiome and cellular data. Receive tailored food and supplement recommendations to optimize digestion, energy, immunity, and aging. Integrates with HealthKit for a comprehensive view of your well-being.

Microbiome analysisPersonalized food recommendationsCustom supplement formulation

💪 Health & Fitness

free with in-app purchases

Birdie - Fresh Air Company

Birdie - Fresh Air Company

Birdie - Fresh Air Company

This app pairs with Birdie Pro devices to monitor indoor air quality. It tracks CO2, temperature, humidity, mold risk, and local pollen levels. View historical data and access educational content on indoor climate.

CO2, temperature, humidity trackingMold risk assessmentLocal pollen level monitoring

The Community Blood Center

The Community Blood Center

The Community Blood Center

by Community Blood Center, Inc.

Easily book, manage, and track your blood donations across the Midwest. Find nearby donor centers and blood drives, view your donation history, and monitor your health data from each visit. Connect with a vital community resource that supports local patients and hospitals.

Book donationsManage appointmentsTrack donation history

💪 Health & Fitness

Personalized Autoimmune Care

Personalized autoimmune care offering evidence-based nutrition and lifestyle coaching. Connect with board-certified coaches for tailored plans addressing nutrition, sleep, stress, movement, and community support. Designed for those seeking answers beyond traditional medicine.

Personalized 360º care plans1:1 board-certified coachingEvidence-based nutrition guidance

💪 Health & Fitness

free with in-app purchases

CreatinineClearanceCalculator

CreatinineClearanceCalculator

CreatinineClearanceCalculator

CreatinineClearanceCalculator

This medical app calculates creatinine clearance and eGFR on one screen. It supports metric and US customary units, different serum creatinine units, and multiple MDRD formulas based on race. It's useful for drug dosage examination and renal failure evaluation.

Single-screen creatinine clearance and eGFR calculationMetric and US customary unit supportAdjustable serum creatinine units (mg/dL, μmol/L)

Simple, smart pool maintenance

This app helps DIY pool owners maintain their pools with expert water test analysis and personalized product recommendations. It offers troubleshooting for common pool problems and allows users to shop for recommended products online.

Scan pool test stripsManual test result entryAI-driven water test analysis

free with in-app purchases

Allergy Test Pro

Allergy Test Pro

Allergy Test Pro

Track daily allergy experiences, including symptoms, mood, meals, and environmental factors. Organize your history with a calendar and timeline, and generate reports to identify trends. Export your journal data as a PDF for personal records.

Symptom trackingMood loggingMeal and medication recording

💪 Health & Fitness

by Brian Dale Vander Werf MD Inc

This medical tool provides accurate and flexible acid-base analysis for healthcare professionals. It offers detailed explanations, customizable ranges, and advanced features like anion gap correction and A-a gradient adjustments for various patient conditions and locations.

Validated accuracy with real-world testingPlausibility checks for physiologically impossible dataAutomatic anion gap correction with albumin

Telehealth, tests, & treatment

Access convenient healthcare from your phone. Get telehealth appointments for various health concerns, manage your at-home lab tests with expert guidance, and view physician-reviewed results. Your journey to better health is made affordable and easy.

Telehealth appointments for various health concernsAt-home lab test collection supportPhysician-reviewed test results

💪 Health & Fitness

free with in-app purchases

TrueView Health

TrueView Health

TrueView Health

Discover your True Health

This app independently tests popular supplements for potency and contaminants. It helps you discover what's truly in your products, avoid overpaying for ineffective formulas, and identify hidden issues like heavy metals or label inaccuracies.

Independent lab testing of supplementsPotency and contaminant analysisIdentify heavy metals and microbes

💪 Health & Fitness

free with in-app purchases

Chozr: Food Scanner

Chozr: Food Scanner

Chozr: Food Scanner

AI Food Scanner

This app uses AI to scan product barcodes and provide personalized insights into their nutritional content, ingredients, and potential allergens. It helps users make healthier choices based on their specific health goals and dietary needs, covering both food and cosmetic products.

Barcode scanning for food and cosmeticsPersonalized nutrition scoresCosmetic ingredient analysis

🍔 Food & Drink

Skin care, supplements & more

Discover medical-grade, natural, and organic skincare products and high-quality nutritional supplements. Find science-backed ingredients for radiant skin and overall health, with cruelty-free options for all skin types and ages. Explore curated plans to guide your wellness journey.

Medical-grade skincareNatural & organic productsHigh-quality nutritional supplements

🛍️ Shopping

free with in-app purchases

FAQ about C4A

Are there free c4a apps for iPhone?

Yes — 20 of the top c4a apps we rank are free to download, including Click4Appointment and C4A.

Does Click4Appointment have ads or in-app purchases?

Click4Appointment has no ads and has no in-app purchases, according to its App Store listing as of November 2026.

How many c4a apps are on the App Store?

We track 249+ c4a apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.

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