Comparison

IntervalTimer vs AI Journal & Diary CAIRN PRO

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

Head to head
About

IntervalTimer

This app provides a minimalist yet powerful interval timer for high-intensity workouts like HIIT, Tabata, and EMOM. It features professional voice guidance, customizable templates, and a clear, large display for easy readability during exercise.

Highlights
  • Professional voice guidance
  • 20+ built-in workout templates
  • Customizable interval presets
  • Extra-large, readable display
  • Three-color phase coding
  • Workout session tracking
Features
Read full description

Every Round, Get Stronger. A minimalist yet powerful interval timer designed for HIIT, Tabata, EMOM, and all high-intensity workouts.  Now featuring 20+ built-in templates and professional voice guidance. Set your intervals in seconds with our precision vertical ruler.  Start training with one tap.  See your countdown from across the room with our extra-large display—perfect for the gym floor or yoga mat. ◆ BUILT FOR REAL WORKOUTS • Professional Voice Guidance: Male and female voice options for Work, Rest, and Round transitions • Haptic feedback for key phase transitions • Pause, resume, and recovery from interruptions • Auto time correction when returning from background • Background audio cues (Coming Soon): Will work seamlessly with your music ◆ READY-TO-USE TEMPLATES • 20+ Professional Templates built-in • Tabata Classic (20s work / 10s rest × 8) • EMOM 10 (Every Minute on the Minute) • Sprint Starter (Quick high-intensity intervals) • Create and save your own custom presets ◆ PRECISION INTERVAL EDITING • Vertical ruler with 1-second precision • Smart haptic feedback on every tick • Floating value display—your finger never blocks the numbers • Adjust Work, Rest, Intervals, and Rounds with intuitive controls ◆ CRYSTAL-CLEAR COUNTDOWN • Extra-large timer digits readable from 10+ feet away • Landscape mode for maximum visibility • Three-color phase coding: Orange (Work) / Blue (Rest) / Purple (Round Rest) • Always-on display keeps the screen active during workouts ◆ COMPLETE WORKOUT TRACKING • Session summary: total time, work time, rest time, completion rate • Local workout history • Review and repeat past sessions ◆ DESIGNED FOR ATHLETES Perfect for HIIT, CrossFit, circuit training, running intervals, boxing rounds, swimming sets, yoga flows, stretching routines, and any activity that needs precise timing. Train smarter. Train harder.  Train with Intervals Timer. emom,gym,fitness,free,custom,simple,stopwatch Privacy Policy :https://hiittimer.pages.dev/Privacy Terms of Service:https://hiittimer.pages.dev/Terms

About

AI Journal & Diary CAIRN PRO

Features
Read full description

CAIRN is a private journal with a warm AI companion. Write or speak about your day, reflect with a thoughtful listener, and notice the patterns you could not see on your own. Your entries are encrypted and stay on your device. Private by Design: - Entries are stored on your device and encrypted at rest. - Lock everything behind Face ID, Touch ID, or a passcode. - There is no app server. AI requests go directly from your device to Anthropic, never through us. - Your reflections are not used to train AI models by default. A Warm AI Companion: - Reflects back what you wrote and validates how you feel. - Asks one good open question instead of piling on advice. - Choose a tone that fits you: listener, stoic, socratic, coach, or friend. - Adjust warmth and length so it sounds the way you want. Mood and Emotion Tracking: - Capture how you feel with a two-axis pad for pleasantness and energy. - Name precise feelings with a curated emotion vocabulary. - Log a check-in in seconds, with or without writing. Insights and Patterns: - Weekly and monthly AI reflections that surface recurring themes. - Pattern detection, such as moods that tend to dip on certain days. - A private year-in-review of the arcs you lived through. Ask Your Journal: - Ask questions about your own past, like when you last felt proud. - Get answers drawn from your entries, retrieved on your device. Voice Journaling: - Speak instead of type, transcribed on your device. Guided Templates and Prompts: - Gratitude, CBT thought record, decision journal, dream journal, and daily reflection. - Daily prompts plus a prompt library and curated packs. Kind Habits: - Forgiving streaks that encourage you without guilt. - Calendar heatmap, on this day memories, and full-text search. - Gentle reminders you control. You Own Everything: - Export to Markdown or PDF anytime. - Encrypted backup and restore, plus a clean therapist-export PDF. - No lock-in. No ads, ever. CAIRN is a journaling companion, not therapy, medical advice, or a crisis service. It complements professional care and is not a substitute for it. Journaling is free forever. Pro unlocks the AI features with a monthly plan, an annual plan, or a one-time lifetime unlock. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

IntervalTimer4 screens
AI Journal & Diary CAIRN PRO4 screens

Verdict

The call

The clearest difference is price: IntervalTimer at Free against AI Journal & Diary CAIRN PRO's $1.99. IntervalTimer also leads on update cadence (every 10 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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

IntervalTimer is free to download; AI Journal & Diary CAIRN PRO costs $1.99 up front. IntervalTimer sells 3 in-app purchases, starting at $1.99 per month and AI Journal & Diary CAIRN PRO sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

IntervalTimer ships an update every 10 days, AI Journal & Diary CAIRN PRO every 2 months. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 8 level
IntervalTimer versus AI Journal & Diary CAIRN PRO: the parameters behind the verdict, then further details
ParameterIntervalTimerAI Journal & Diary CAIRN PRO
PriceFree — better$1.99
Rating3.7 (3 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 10 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.6
Further details — not scored
Size18 MB5 MB
Age rating4+4+
DeveloperPinyipin Technology (Chongqing) Co., Ltd.Aneesh Pradeep

In-app purchases

3 purchases

IntervalTimer

Subscriptions2
  • PRO Monthly $1.99$1.991 Month
  • PRO Annual $19.99$9.991 Year
One-time1
  • Interval Timer Pro Lifetime$39.99
3 purchases

AI Journal & Diary CAIRN PRO

Subscriptions2
  • Pro Monthly$4.991 Month
  • Pro Annual$29.991 Year
One-time1
  • CAIRN Pro$69.99

Questions

Is IntervalTimer free?
IntervalTimer is free to download, with in-app purchases available.
Is AI Journal & Diary CAIRN PRO free?
AI Journal & Diary CAIRN PRO costs $1.99, and also offers in-app purchases.
Do IntervalTimer or AI Journal & Diary CAIRN PRO have ads?
Neither IntervalTimer nor AI Journal & Diary CAIRN PRO shows ads.
Which is updated more often, IntervalTimer or AI Journal & Diary CAIRN PRO?
IntervalTimer ships an update every 10 days, and AI Journal & Diary CAIRN PRO every 2 months. Most recently, IntervalTimer was updated on October 31, 2026 and AI Journal & Diary CAIRN PRO on November 10, 2026.

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