Comparison

C vs Liner Notes

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

Head to head
About

C

This app verifies gym check-ins with GPS to track real progress and build streaks. It allows users to log workouts, compete on leaderboards, and connect with friends and local gym communities. Premium features offer advanced analytics and customization.

Highlights
  • GPS-verified gym check-ins
  • Workout logging (exercises, sets, reps, weight)
  • Streaks and XP for gym attendance
  • Monthly gym leaderboards
  • Social features: follow friends, group challenges
  • Muscle group identification
  • Rest timer with Lock Screen Live Activities
Features
Read full description

Most fitness apps take your word for it. C-Rex does not. C-Rex is a GPS-verified gym and workout tracker that turns showing up into real progress. Every check-in is tied to the gym you are actually visiting. Build streaks, earn XP, compete on monthly gym leaderboards and train with people around you. SHOW UP AND MAKE IT COUNT Check in when you arrive at the gym. C-Rex uses GPS to verify that you are actually there. Build a streak based on real gym sessions, not good intentions. Earn XP and climb your gym’s monthly leaderboard. Join challenges and earn rewards when you complete them. TRAIN WITH YOUR PEOPLE Follow friends and see who is training right now. View your friends’ workout activity in one feed. Create or join groups with your training partners. Take on group challenges together. Message the people you train with without leaving the app. LOG EVERY WORKOUT Track exercises, sets, reps, weight, duration and cardio. Choose from a database of 500+ exercises. See a weekly muscle map showing what you have trained. Identify the muscle groups you keep neglecting. Select the muscles you want to work and build a session around them. Use the rest timer while you train. Keep your timer visible on your Lock Screen with Live Activities. FIND YOUR GYM COMMUNITY Discover gyms near you on the map. See who is training at nearby gyms. Find gym buddies who match your training lifestyle. Share workouts, progress and achievements with the community. C-REX PREMIUM Upgrade to Premium for: Progress charts over time Private progress comparisons with friends The ability to see who viewed your profile Custom name colours and emojis GIFs in group chats Streak Shield protection C-Rex’s core features — including gym check-ins, workout logging, streaks, XP, social features, challenges and chat — are available for free. Premium is available as a monthly or yearly subscription. Subscriptions automatically renew unless cancelled at least 24 hours before the current billing period ends. Payment is charged to your Apple Account upon confirmation of purchase. You can manage or cancel your subscription through your Apple Account settings after purchase. Privacy Policy: https://gym-app-ce4a9.web.app/privacy Terms of Service: https://gym-app-ce4a9.web.app/terms

About

Liner Notes

This AI-powered journal transforms your daily reflections into unique visual art, personalized music recommendations, and weekly letters. It helps you capture feelings, track your mood, and see your days in context without pressure or guilt.

Highlights
  • AI visual art generation
  • Personalized music recommendations
  • Weekly summary letters
  • Drafts from photos and events
  • Voice and text entry
  • Home and Lock Screen widgets
  • Privacy-focused design
Features
Read full description

Your day, journaled for you. Liner Notes is an auto diary and voice journal that drafts your day from your photos, sleep, steps, heart rate and conversations, and keeps the time you spend with the people who matter as memories. No account. Your records stay on your iPhone. PHOTOS, SLEEP, STEPS WRITE YOUR DAY Your places, photos, plans, sleep, steps and workouts are already a draft of the day. Read it, change only what you want, and keep it. On days you'd rather talk, one line into the mic is plenty. YOUR HEART RATE, TENSE OR RELAXED With Apple Watch, your heart rate and heart rate variability (HRV) are compared with your usual self at that time of day, so a timeline shows when your body was tense and when it was relaxed. Plans, places, workouts and sleep sit alongside. After a workout, see how your heart rate came back down. This feature is for keeping and reflecting on your days. It is not intended for diagnosis or medical use. TIME WITH PEOPLE, IN THEIR WORDS Keep a conversation from a spoken note, and it's transcribed on your iPhone and split by speaker; summaries are made with Apple's Private Cloud Compute. The recording is deleted once it's text. Whether to tell people in the room is up to you. Conversations with people you name become part of your memories of them. FROM APPLE WATCH, TOO One press on your wrist starts recording. Your iPhone takes it from there. HEART RATE AND VOICE AS YOU TALK Your heart rate, the pitch of your voice, how much each of you talked, and laughter line up over a conversation, so you can see where it came alive. SEE HOW YOUR RELATIONSHIPS SHIFT Who you spent time with, and on what. People become glass particles and topics become capsules that shift as time plays. Liner Notes also tells you in plain words who appeared for the first time and who you haven't seen in a while. A PICTURE AND A SONG FOR EVERY DAY Each day's entry gets a picture and a song that fits. Each morning, a short note picks up from the day before, and at the end of the week, a letter to you arrives from seven days of records. YOUR RECORDS STAY ON YOUR IPHONE - There is no account - Your diary and conversations are stored on your iPhone - You choose where text is created in Settings: on your iPhone, Apple's private cloud, or OpenAI. OpenAI is used only with your consent, while you subscribe or during the preview - Export every record anytime as Markdown or as a full copy NO STREAKS, NO GUILT No streak counters, no "you missed a day" messages. While you're away, the automatic record keeps going, and it's waiting when you come back. FEATURES - A diary draft from places, photos, plans, sleep and steps - A day timeline from heart rate and HRV (tense and relaxed) - Conversation records with speakers and summaries, and recording from Apple Watch - Heart rate, voice pitch and laughter over a conversation - Workout heart rate and how it came back down afterward - Atlas: how people and topics shift over time, with highlights - The day's picture and tonight's song - A morning note and a weekly letter - Home Screen and Lock Screen widgets, Siri and the Action Button - Records calendar and "One year ago today" - Export as Markdown or a full copy, and a daily copy to iCloud Drive PRICING The daily diary, automatic records, drafting and polishing, and export are free forever, plus a morning note once a week. Your first 3 mornings (up to 7 days) let you try the subscription with no card and no automatic charge. The subscription adds a morning note every day, weekly letters, conversation records, the day's picture and tonight's song. Family Sharing supported. Full playback of tonight's song requires an Apple Music subscription. Keep the days that slip away. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://linernotes.aves.ltd/en/privacy.html

Screenshots

C4 screens
Liner Notes4 screens

Verdict

The call

The clearest difference is iOS requirement: C at 16.0 against Liner Notes's 18.0. On price, rating, review sentiment and ratings volume 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. C sells 2 in-app purchases, starting at $4.99 per month and Liner Notes sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for C against 5.0 for Liner Notes. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

C ships an update every 5 days, Liner Notes weekly. Both last shipped on October 28, 2026.

Scorecard1 real difference · 9 level
C versus Liner Notes: the parameters behind the verdict, then further details
ParameterCLiner Notes
PriceFreeFree
Rating5.0 (5 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings5 — better2
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS16.0 — better18.0
Further details — not scored
Size125 MB36 MB
Age rating12+4+
DeveloperJerry KwongAves Inc.

Customer experience

C

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Liner Notes

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

C

Subscriptions2
  • C-Rex Monthly Subscription$4.991 Month
  • C-Rex Yearly Subscription$49.991 Year
2 purchases

Liner Notes

Subscriptions2
  • Monthly$3.991 Month
  • Annual7 Days trial$29.991 Year

Questions

Is C free?
C is free to download, with in-app purchases available.
Is Liner Notes free?
Liner Notes is free to download, with in-app purchases available.
Which has better reviews, C or Liner Notes?
C and Liner Notes are both rated 5.0 out of 5 on the App Store, from 5 and 2 ratings respectively.
Do C or Liner Notes have ads?
Neither C nor Liner Notes shows ads.
Which is updated more often, C or Liner Notes?
C ships an update every 5 days, and Liner Notes weekly. Most recently, C was updated on October 28, 2026 and Liner Notes on October 28, 2026.

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