Comparison

15 Minutes vs Interstitial Journal App

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

Head to head
About

15 Minutes

This app helps you understand how you spend your time by prompting you every 15 minutes to log your current activity. It offers a simple yet effective way to analyze your productivity and optimize your schedule.

Highlights
  • Configurable 15-minute time slots
  • Automatic activity reminders
  • Weekly time navigation
  • Daily progress indicators
  • Customizable daily schedule
  • Intuitive interface
  • Local data storage
Features
Read full description

Where did your day go? 15 Minutes answers with one simple habit: every 15 minutes, a reminder asks what you're doing, and you jot it down in a few words. Reply right from the notification, without even opening the app. At the end of the day, you see exactly how you spent your time, slot by slot. HOW IT WORKS • Your day is split into 15-minute slots, from the hour you wake up to the hour you go to bed • A reminder every 15 minutes, with a choice of sounds • Reply right from the notification to log your activity in seconds • Smart suggestions from your task history: one tap and it's logged • Forgot a few slots? Quick Add fills in a whole day in a minute FOCUS MODE • Work in 15-minute sprints with a full-screen countdown ring • The screen stays awake while you focus • When the sprint ends, log what you did and the next one starts on its own DAILY GOALS • Set your 3 goals for the day each morning • They stay in sight all day long • See how yesterday went before you start SEE WHERE YOUR TIME GOES • Day summary with a time breakdown chart • Smart categories by on-device AI (Apple Intelligence): work, health, learning, social and more • Productivity score with a short insight about your day • Completion rate, total time and unique tasks • Current and longest streaks, best day and records • Activity by hour of day and by weekday YOUR DATA, YOUR WAY • Export your history as CSV, JSON or PDF, by week, month or all time • iCloud sync across iPhone, iPad and Apple Vision Pro • Day Off mode pauses reminders when you rest • 8 color themes: Sunrise, Ocean, Forest, Lavender, Midnight, Coral, Mint and Gold MADE FOR IPHONE, IPAD AND IPHONE DUO • On iPad and the inner display of iPhone Duo, your timer, goals and day sit side by side • Fold iPhone Duo like a laptop: the timer on top, your day below • Clean, simple interface in English, French and Spanish WHY 15 MINUTES 15 minutes is the sweet spot: short enough to catch every change of activity, long enough not to get in your way. Perfect for professionals who want to understand their productivity, freelancers who bill by the hour, students planning their study sessions, and anyone who wants to stop wondering where the day went. Free, no ads, no account. Your data stays in your iCloud.

About

Interstitial Journal App

Capture fleeting thoughts and task transitions with a private digital notebook. Quickly jot down notes or speak them, and they are automatically timestamped. Organize entries with customizable tags and gain insights into your daily patterns.

Highlights
  • Type or speak entries
  • Automatic timestamps
  • Editable and customizable tags
  • Lock Screen and Dynamic Island integration
  • On-device insights and patterns
  • Export to JSON or Markdown
Features
Read full description

Capture the moments between tasks. Interstitial Journal is a small, private notebook for the gaps in your day — before you start, when you switch, when you get stuck, when you finish. Type a line or speak it; it's timestamped automatically and it's entirely yours. Pay once — no subscription, no account, and everything stays in your own iCloud. THE IDEA The transitions between tasks are where focus leaks away. A quick note — what you just did, what's next, how you feel — helps you land in the next thing instead of carrying the last one with you. Interstitial Journal makes that note effortless. HOW IT WORKS - Open a blank note and write a line, or tap the keyboard mic and say it - Add a tag, and optionally how you're feeling - There's no Save button — it's kept the moment you're done - Your day reads back as a running timeline, newest first WHAT'S INSIDE - Type or speak (system dictation to text; no audio is stored) - Automatic timestamps on every entry - Editable tags — five to start (Work, Personal, Idea, Mood, Health); rename, recolor, reorder, or add your own - Start a task to see it live on your Lock Screen, Dynamic Island, widgets, and the Mac menu bar; finishing logs the time — and the running task stays in step across your devices - On Apple Watch: dictate a line, see your recent entries, start and finish tasks, and add complications to your watch face — synced through your own iCloud, on your wrist whenever you open the app - On-device insights: entries per day, when in the day you write, focus time, and patterns by tag and mood — by week, month, or all time - Export everything to JSON or Markdown anytime PRIVATE BY DESIGN - No account and no subscription - Your entries live in your own iCloud (a private CloudKit database) and on your devices - There's no server we control and nothing we can read - Turn on Apple's Advanced Data Protection for full end-to-end encryption A NOTE ON THE SCIENCE Built on research into attention, reflection, and habit. Interstitial journaling itself hasn't been formally trialed, and this app is for reflection, not treatment. Requires iOS 17 / iPadOS 17 or later. Also on Mac (macOS 14+) and Apple Watch (watchOS 10+) — one purchase covers iPhone, iPad, Mac, and Apple Watch. From comun.ai, a London studio.

Screenshots

15 Minutes4 screens
Interstitial Journal App4 screens

Verdict

The call

The clearest difference is rating: Interstitial Journal App at 5.0 against 15 Minutes's 4.4. Interstitial Journal App also leads on iOS requirement (17.0 vs 26.0). 15 Minutes's advantage is update cadence (every 2 weeks vs monthly) and chart position (#102 vs unranked). On price, ads, in-app purchases and monetization model 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

15 Minutes costs $3.99 and Interstitial Journal App $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Interstitial Journal App holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 2 respectively.

UpkeepUpdate frequency

15 Minutes ships an update every 2 weeks, Interstitial Journal App monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 6 level
15 Minutes versus Interstitial Journal App: the parameters behind the verdict, then further details
Parameter15 MinutesInterstitial Journal App
Price$3.99$3.99
Rating4.4 (8 ratings)5.0 (2 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings8 — better2
Update frequencyEvery 2 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#102 — better—
DevicesiPhone, iPad, Vision ProiPhone, iPad, Mac, Apple Watch — better
Requires iOS26.017.0 — better
Further details — not scored
Size9 MB7 MB
Age rating4+4+
DeveloperDevpoolComunAI Ltd

Customer experience

15 Minutes

All ratings8 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Interstitial Journal App

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

15 Minutes

No in-app purchases

None

Interstitial Journal App

No in-app purchases

Questions

Is 15 Minutes free?
15 Minutes costs $3.99, with no in-app purchases.
Is Interstitial Journal App free?
Interstitial Journal App costs $3.99, with no in-app purchases.
Which has better reviews, 15 Minutes or Interstitial Journal App?
Interstitial Journal App is rated higher. 15 Minutes averages 4.4 out of 5 from 8 ratings, while Interstitial Journal App averages 5.0 from 2 ratings.
Do 15 Minutes or Interstitial Journal App have ads?
Neither 15 Minutes nor Interstitial Journal App shows ads.
Which is updated more often, 15 Minutes or Interstitial Journal App?
15 Minutes ships an update every 2 weeks, and Interstitial Journal App monthly. Most recently, 15 Minutes was updated on October 25, 2026 and Interstitial Journal App on October 24, 2026.

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