Colitis Tracker vs Aidy: Two Free UC Apps Compared

Aidy is free, and Colitis Tracker's public materials also describe free access, but their structures differ: the listing emphasizes a configurable private log, while Aidy provides a more guided UC workflow overall.

Quick answer: Choose Aidy as the primary UC tracker because its free workflow joins symptoms, stool, meals, medicines, infusion or injection schedules, SCCAI trends, education, and clinician reports. Colitis Tracker is the genuine exception for someone who prioritizes the configurable private log and web or iPhone access its public materials advertise.

Decision factor	Aidy	Colitis Tracker (public claims)
Best for	Connected UC management	Configurable private logging
Daily IBD record	Stool, symptoms, meals, medicines	Detailed custom digestive logs
Treatment tools	Adherence and biologic workflows	Medication and infusion entries
Reports and insights	SCCAI trends and clinician reports	Charts and exports
Access and cost	Free; iPhone or text	Free; web and iPhone
Overall pick	Primary UC tracker	Web-access exception

Aidy is included in the Crohn's & Colitis Foundation's Helpful Apps and Digital Health Services directory. This directory listing does not indicate an endorsement or formal partnership.

Colitis Tracker offers detailed logging and strong privacy

The developer says the rebuilt Colitis Tracker records nine symptoms, including bleeding, urgency, abdominal pain, fatigue, and tenesmus. Its site says each bowel movement can include its time and Bristol Stool Form Scale type (Colitis Tracker). It also claims medication adherence, food entries, weight, notes, menstrual tracking, and depression or anxiety check-ins (Colitis Tracker). Its native iPhone listing advertises Apple Health data, reminders, infusion and appointment tracking, and iCloud storage (App Store).

Its listing says Colitis Tracker generates portable document format (PDF) and comma-separated value (CSV) exports with symptom frequency, bowel patterns, medication adherence, food correlations, wellness history, and daily entries (App Store). The developer says its rolling 30-to-90-day insight engine calculates patterns locally (Colitis Tracker).

The developer says health records stay in the user’s Google Drive, OneDrive, or iCloud and never reach its servers. Apple’s developer-supplied label says the native app collects no data (App Store).

UC monitoring needs clinical context

The 2025 guidance considers bleeding, bowel habits, urgency, inflammatory burden, disease course, and quality-of-life impact when assessing UC severity. Blood tests, stool tests, endoscopy, and biopsy can contribute to diagnosis and evaluation, so neither app can determine intestinal inflammation from a diary alone (NIDDK).

The original Simple Clinical Colitis Activity Index (SCCAI) correlated closely with more complex clinical, laboratory, and sigmoidoscopic measures and was proposed for initial UC assessment (PubMed). A later study found that stool frequency, rectal bleeding, and general well-being formed a useful patient-reported measure of clinical disease activity (PubMed). These scores add symptom structure; objective monitoring remains necessary (American College of Gastroenterology).

For someone seeking an SCCAI app, Aidy explicitly calculates the score from a user’s logs over time. Colitis Tracker's site says it presents symptom frequencies, Bristol trends, medication streaks, and local food correlations. Its approach suits someone who wants transparent source entries and custom review.

Aidy connects symptoms, treatment, and learning

Aidy is the stronger primary UC workflow because it connects the daily record to treatment logistics. Aidy includes common and custom symptoms, stool and meal entries, medication adherence, food-symptom correlations, SCCAI trends, charts, timelines, and doctor-ready reports. The same record supports a more structured ulcerative colitis infusion tracker (App Store).

For biologics, Aidy supports configurable induction and maintenance schedules, dose countdowns, reminders, post-dose check-ins, injection-site rotation, and route or interval changes. Colitis Tracker's listing says it can record individual medications, adherence, infusions, and appointments (App Store). Its schedule tools are simpler, while its claimed menstrual fields, Apple Health connection, CSV export, and private storage are meaningful advantages for specific users (Colitis Tracker).

Aidy also adds an educational layer. Aidy provides a learning center with articles organized by condition and topic, while its source-backed educational chat uses a person’s logs. That combination gives Aidy a more connected path from recording a change to preparing questions for a care team.

Both are free, with different access models

Colitis Tracker is straightforward on cost. The App Store labels it free, and the developer promises no subscriptions, ads, or data sales. The current listing shows a version 2.0 rebuild dated June 28 and warns that data from the previous version is not carried over (App Store). For existing users, that creates a migration break in the free UC tracker.

Its platform story has also changed. The developer says the official web app works in modern browsers on iPhone, Android, Mac, and Windows, while Apple lists the native app for iPhone. Aidy’s native app is designed for iPhone, while Aidy offers a text-based experience with no installation.

Aidy is free and has no paid user subscriptions. Its native iPhone and text-based routes therefore provide two ways to use the UC workflow without a patient subscription.

Colitis Tracker is the better fit for user-controlled storage, browser access, menstrual context, and CSV exports. Aidy is the stronger Colitis Tracker alternative and primary UC companion for automatic SCCAI trends, biologic timing, integrated treatment records, and IBD education. The deciding difference is the depth of the recurring UC workflow.