Comparison

Within vs Day Zero

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

Head to head
About

Within

This app provides an anonymous audio journal for emotional well-being, using evidence-based psychological techniques like cognitive behavioral therapy. It helps users process emotions, identify patterns, and connect with an anonymous community for shared perspective.

Highlights
  • Anonymous audio journaling
  • Evidence-based psychological techniques
  • Cognitive behavioral therapy sessions
  • Emotion identification and processing
  • Anonymous community sessions
  • Daily practice tracking
  • Emotional pattern learning
Features
Read full description

Within is the world’s first anonymous self-talk audio journal designed from evidence-based psychological techniques for emotional well-being. Process your emotions in real time as they come up with self-talk audio sessions rooted in cognitive behavioral therapy. Learn to name your emotions to effectively move through them. Listen to anonymous community sessions to gain perspective and grow. Develop a daily self-talk practice, track your sessions over time and learn your emotional patterns. Within was created for authentic and vulnerable self talk, in a space of communal anonymity. A small reminder that you are not alone in how you feel. This is your space to release the thoughts that arise in your mind and create enough separation so you can reflect on them rather than be driven by them. Particularly the ones that lead to behaviors and actions that do not help you live the life you want. One of the most powerful transformation tool is the human voice. It was the voice of our caregivers that shaped us before we were ever born, and the voice of our peers, media and culture that continue to influence us to this day. In some ways, helpful and others not so much. Within is about reclaiming your authentic voice. The one you were born with. It’s the finger print of the inner you. Your essence. So be bold, speak your truth, let go of whatever is weighing you down and speak words that affirm your core values as you discover them over time. We call these moments self-talk sessions.

About

Day Zero

This app helps you track habits by displaying the number of days since you last performed a specific action. It offers flexible scheduling, personalized feedback, and home screen widgets for easy logging. Designed for privacy, it stores all data locally on your device.

Highlights
  • Days since last action counter
  • Home screen widgets for logging
  • Flexible daily or weekly scheduling
  • Personalized voice and 'why' prompts
  • Pause and resume habits
  • Private by design, no accounts or servers
Features
Read full description

One number per habit: how many days since you last showed up. Keep it at zero. That’s the whole game. Day Zero is accountability without the noise — no streak anxiety, no social feeds, no accounts. Just a big honest number that goes green when you show up and red when you don’t, on your Home Screen where you can’t ignore it. THE RITUAL Open to Today: what’s owed, what’s done, one tap to settle up. Every habit gets its own board — the number, the week’s dots, and a line of copy with actual personality. DAILY OR SCHEDULED Run flexible targets (4× a week) or pin specific weekdays. Planned rest days get calm recovery copy instead of guilt — and if your weekly goal is mathematically at risk, the card says so out loud. GOLD WEEKS Hit your weekly target and everything turns gold. Win EVERY habit’s week and you’ve earned a Perfect Week — with a shareable gold poster. Sharing is earned here, not ambient. WIDGETS THAT WORK Log with one tap from the Home Screen or Lock Screen. A single-habit widget in every size, plus an all-habits overview that goes gold on perfect weeks. LIFE HAPPENS Pause any habit: the number stays honest, the guilt switches off, and a gentle check-in asks when you’re ready. Logging anything brings you back instantly. A VOICE, NOT A DASHBOARD Hundreds of hand-written lines that rotate daily and never repeat until the pool runs dry. Optionally, let on-device Apple Intelligence write fresh lines from your real context — your gap, your week, your goal. Tap any card to flip it: your “why” waits on the back in a gold frame. PRIVATE BY ARCHITECTURE No accounts. No analytics. No servers. Everything lives on your phone. Habits: running, reading, meditation, stretching, strength, swimming, cycling, rowing — or build your own with an 84-icon library.

Screenshots

Within4 screens
Day Zero4 screens

Verdict

The call

The clearest difference is ratings volume: Within at 24 against Day Zero's 1. Within also leads on iOS requirement (16.0 vs 18.0). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Within against 5.0 for Day Zero. That said, the two scores are not equally well evidenced: Within has 24 ratings behind it against 1, so its average is the more settled of the two.

Scorecard2 real differences · 8 level
Within versus Day Zero: the parameters behind the verdict, then further details
ParameterWithinDay Zero
PriceFreeFree
Rating4.9 (24 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings24 — better1
Update frequencyFortnightly—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS16.0 — better18.0
Further details — not scored
Size43 MB3 MB
Age rating12+4+
DeveloperInnerverse Inc.Quentin Perrot

In-app purchases

None

Within

No in-app purchases

None

Day Zero

No in-app purchases

Questions

Is Within free?
Within is free to download, with no in-app purchases.
Is Day Zero free?
Day Zero is free to download, with no in-app purchases.
Which has better reviews, Within or Day Zero?
Day Zero is rated higher. Within averages 4.9 out of 5 from 24 ratings, while Day Zero averages 5.0 from 1 ratings.
Do Within or Day Zero have ads?
Neither Within nor Day Zero shows ads.

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