Comparison

Steadyline vs Stack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Steadyline

This app helps individuals with bipolar disorder track their moods, symptoms, and medication adherence. It provides visual charts and reports to identify patterns and prepare for discussions with healthcare professionals. Optional AI features offer further insights into logged data.

Highlights
  • Mood and symptom logging
  • Medication adherence tracking
  • Sleep duration and quality logging
  • Pattern analysis charts
  • Psychiatrist report generation
  • Optional AI reflection
  • Educational guides on bipolar disorder
Read full description

Steadyline is a bipolar mood tracker and symptom journal for recording low and elevated moods separately. Review your patterns over time and prepare a clear report for your psychiatrist. Keep a daily record of how you feel and what happened between appointments, with charts that help you look back across weeks and months. DAILY BIPOLAR TRACKING • Record low mood, elevated mood, anxiety, irritability, and energy. • Add symptoms, triggers, changes in movement or activity, and daily notes. • Track sleep duration and quality alongside your mood. • Log medication adherence and set reminders. • Include optional menstrual-cycle context. • Use Voice Log when typing feels difficult. REVIEW YOUR MOOD PATTERNS See your entries together in charts. Current Signals highlights patterns in the data you record, while the Stability Score summarizes recent self-reported trends. Review sleep and medication records alongside mood changes for additional context. PREPARE FOR PSYCHIATRIST APPOINTMENTS Create a structured report with mood trends, sleep patterns, medication adherence, symptoms, and stability. Protect your report with a password and share it with your psychiatrist or doctor when you choose. OPTIONAL AI REFLECTION Ask SAM can help you review saved logs and summarize patterns for reflection. AI features are optional and can be turned off. LEARN ABOUT BIPOLAR DISORDER Explore more than 200 guides on bipolar disorder, mood tracking, sleep, medication, and preparing for conversations with your care team. CONTROL YOUR DATA Your logs stay on your device by default. Cloud Sync, AI features, and report sharing are optional. Steadyline does not save voice recordings. Export or delete your data when you choose. BUILT FROM LIVED EXPERIENCE Steadyline was built by a software engineer who lives with bipolar disorder and uses the app. SUBSCRIPTIONS Charts, pattern insights, doctor reports, and AI features require a paid subscription. Available plans and any trial eligibility are shown before purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current subscription period. Manage or cancel your subscription in your Apple account settings. Steadyline is a self-management and record-keeping tool. It does not diagnose, treat, or predict episodes and does not replace professional care. AI summaries, Current Signals, and the Stability Score are for reflection on your records, not medical advice. If you are in immediate danger or cannot stay safe, contact local emergency services. In the United States, call or text 988. Terms of Use (EULA): https://steadyline.app/terms Privacy Policy: https://steadyline.app/privacy

About

Stack

Features
Read full description

Stack is the supplement tracker that finally looks as good as the rest of your day. Track your vitamins, supplements and medications, get reminders so you never miss a dose, and build a streak that keeps you consistent. No clutter. No noise. Just a calm, beautiful daily ritual that takes seconds. BUILD YOUR STACK Add anything you take in seconds with smart suggestions from a built-in library of vitamins, minerals, supplements and common medications. Everything is organised automatically by time of day. NEVER MISS A DOSE Set gentle reminders around your routine. Mark each one taken with a single tap and watch your day fill in. Morning, midday, evening or night, Stack keeps you on track. KEEP YOUR STREAK Consistency is what actually delivers results. Stack counts your daily streak and celebrates the milestones that keep the habit alive. MEET YOUR ADVISOR Unlock a personal supplement advisor that knows your goals, diet and routine. Get a full review of your stack, spot gaps and interactions, and fine-tune your timing and doses. Ask anything in plain language, and go deeper into the science whenever you want. Add any recommendation to your stack with one tap. PRIVATE BY DESIGN Your data stays on your device. No accounts, no ads, no tracking, ever. Stack Pro unlocks the Advisor with a 7-day free trial, then a simple subscription. Cancel anytime. Stack provides general information about supplements and nutrition. It is not a substitute for professional medical advice, diagnosis or treatment. Always consult a qualified healthcare professional before changing your supplement or medication routine. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Steadyline4 screens
Stack4 screens

Verdict

The call

The clearest difference is update cadence: Stack at every 3 days against Steadyline's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Steadyline sells 4 in-app purchases, starting at $7.99 per month and Stack sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Steadyline ships an update every 9 days, Stack every 3 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

Scorecard1 real difference · 9 level
Steadyline versus Stack: the parameters behind the verdict, then further details
ParameterSteadylineStack
PriceFreeFree
Rating4.4 (9 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size70 MB9 MB
Age rating17+4+
DeveloperRavi MishraHenry Hinge

In-app purchases

4 purchases

Steadyline

Subscriptions4
  • Steadyline Premium Monthly$7.991 Month
  • Steadyline Core$7.991 Month
  • Steadyline Core Yearly$39.991 Year
Show 1 more
  • Steadyline Premium Yearly7 Days trial$39.991 Year
2 purchases

Stack

Subscriptions2
  • Stack Pro7 Days trial$5.991 Month
  • Stack Pro7 Days trial$39.991 Year

Questions

Is Steadyline free?
Steadyline is free to download, with in-app purchases available.
Is Stack free?
Stack is free to download, with in-app purchases available.
Do Steadyline or Stack have ads?
Neither Steadyline nor Stack shows ads.
Which is updated more often, Steadyline or Stack?
Steadyline ships an update every 9 days, and Stack every 3 days. Most recently, Steadyline was updated on November 11, 2026 and Stack on November 10, 2026.

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