Comparison

Gym Log+ vs Caelyn

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

Head to head
About

Gym Log+

This app is a fast and private workout tracker designed for logging lifting sets quickly. It offers comprehensive features for tracking exercises, routines, and progress, with a focus on user privacy and data ownership. It supports Apple Watch for standalone tracking and integrates with Apple Health.

Highlights
  • Fast set logging
  • Autofill and rest timers
  • Supersets and drop sets
  • Standalone Apple Watch tracking
  • Routine and program building
  • Progress charts and stats
  • Body tracking and photos
Features
Read full description

Gym Log+ is the fast, private workout tracker — logging lifting sets in seconds since 2013, now rebuilt from the ground up for modern iPhone and Apple Watch. I built Gym Log+ in 2013 because I wanted a faster way to log my workouts. I rebuilt it in 2026 for the same reason. ALREADY A GYM LOG+ USER? Welcome back. Your data comes with you: on first launch, the app imports every workout, routine, custom exercise, body log, and progress photo you ever recorded. Nothing is deleted from the old data. And if you bought the app or its Pro upgrade — even years ago — your purchase is honored: you get Pro, for life, at no charge. SWITCHING FROM ANOTHER APP? Bring your history along. Gym Log+ imports other workout apps' CSV exports in about a minute, so your whole training record lives in one place. LOG FAST The whole app is built around one idea: nothing should slow down a set. • Your previous workout's sets sit beside today's — see what to beat, tap Log, done • Autofill suggests your next set; rest timers can start themselves • Per-exercise rest timers, with a separate timer for your last set • Supersets, warm-up sets, failure sets, drop sets, and optional RPE • Cardio too: time, distance, and pace • Warm-up calculator: a plate-rounded ramp up to today's working weight • Plate calculator: exactly what to load on each side of the bar APPLE WATCH — TRULY STANDALONE Leave your phone in the locker. The watch app logs complete workouts on its own — routines, sets, rest timers — and records heart rate and Activity ring credit. Everything syncs up afterward. ROUTINES, FOLDERS, PROGRAMS • Build routines with target sets, reps, and rep ranges • Organize routines into folders — or convert a folder into a program • Programs know what's next: finish today's workout and the next day is queued up • Plan catalog: 15 ready-made plans from beginner to advanced, free • Share any routine or program as a file a friend can open in Gym Log+ CHARTS THAT ANSWER QUESTIONS • A progress chart on every exercise: top set, estimated 1RM, volume, and reps — drag to scrub any day • Stats dashboard: weekly training frequency, muscle-group volume this week vs last, and all your personal records — the last 3 months free, all-time with Pro • Body-weight trend chart BODY TRACKING Log body weight free, with a trend chart, a goal line, and optional two-way Apple Health sync. Pro adds body measurements and progress photos with notes. Finished workouts can be saved to Apple Health too. MULTIPLE PROFILES (PRO) Share one device with a partner or family, or log clients' workouts in person as a trainer — each profile keeps its own routines, history, and body logs. PRIVATE BY DESIGN No account. Not "sign up later" — there is no account, no server, and no ads. Your data lives on your devices and syncs through your own private iCloud. And it stays yours: export a full backup file or a plain CSV spreadsheet any time, free. FREE AND PRO Free, forever: full workout logging, a catalog of 500+ exercises — strength, cardio, stretching, and yoga — plus your own custom exercises, the Apple Watch app, exercise progress charts, body-weight logging, the plan catalog, rest timers, the warm-up and plate calculators, the stats dashboard for the last 3 months, monthly recap cards to share, import, and export. The free tier includes up to 4 routines and 7 custom exercises. Pro unlocks unlimited routines and custom exercises, body measurements and progress photos, multiple profiles, progression suggestions on the logging screen, side-by-side workout comparison, and the all-time stats dashboard with a year-in-review card: $4.99/month, $29.99/year with a 7-day free trial, or $79.99 once — lifetime, no subscription. Bought Gym Log+ before? Pro is already yours. Questions or ideas? support@gymlogplus.com — you'll be talking to the developer. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.gymlogplus.com/privacy.html

About

Caelyn

This period tracker learns your unique cycle patterns and keeps all your health data private on your device. It offers detailed insights into your cycle, symptoms, and mood, with robust privacy features and an optional Pro version for advanced analytics.

Highlights
  • Personalized cycle learning
  • Detailed symptom and mood logging
  • On-device data storage
  • Privacy-focused design
  • Cycle pattern insights
  • Data export (CSV/PDF)
  • Apple Health integration
Features
Read full description

Your period, your patterns, your phone. Nothing leaves it. Caelyn is a period tracker that learns how your cycle actually works, then keeps everything it learns on your iPhone. There is no account to create and no server of ours holding your health data, because we do not run one. WHERE YOU ARE, EVERY DAY Open the app and you know. Cycle day, the phase you are in, and what is coming next. Your next period, your fertile window, and when PMS is likely to start. Log a period, a mood, a symptom, or nothing at all. Caelyn works with whatever you give it and gets sharper the more you log. Track flow, pain and where it hurts, mood, energy, basal temperature, cervical mucus, ovulation and pregnancy tests, medication, and a private note for anything that does not fit a box. Eleven everyday symptoms are built in, and you can add your own. IT LEARNS YOU, NOT AN AVERAGE Most apps assume everyone ovulates fourteen days before their period. Caelyn watches your own logs and works out your real luteal length, your own PMS window, and the symptoms that tend to arrive before you bleed. After a couple of cycles it starts telling you things you would not spot yourself. Which symptoms show up in which phase. When your energy dips. Whether your cycle is steadier than you thought. Every one of those is worked out on your iPhone, from your data, and it shows you the numbers behind it. IS THIS NORMAL The question everyone actually has. Caelyn answers it with your cycle length, your period length, and your pain against the ranges most people fall into, and it says plainly when something is worth a conversation with a doctor. No judgement, no scare tactics. BUILT SO YOUR DATA CANNOT LEAK Every entry lives in a private database on your iPhone. Caelyn makes no network calls of its own. It has no analytics, no advertising, no third party trackers, and nothing to sell. Lock it behind Face ID or a PIN. Hide the app in the switcher so a glance shows nothing. Turn on private notifications so your lock screen never spells out your cycle. Set a duress PIN that quietly erases everything if you ever need it to. This is not a promise about how we behave. It is how the app is built. There is nothing for anyone to hand over, including us. WHEN YOU NEED TO SHOW SOMEONE Export a CSV whenever you like, and keep it wherever you want. Caelyn Pro adds a clear PDF of your history for an appointment, so you walk in with dates and patterns instead of trying to remember. FREE, AND GENEROUS ABOUT IT Unlimited logging, full predictions, the calendar, reminders, five pattern insights, six months of your year in review, a home screen widget, Apple Health, app lock, and CSV export are all free. They stay free. CAELYN PRO Every pattern Caelyn finds instead of the first five. Charts for cycle length, period length, symptoms, mood, pain and temperature. A full twelve months in review. A PDF for your doctor. Fertility tracking if you are trying to conceive, plus pregnancy and postpartum modes. Modes for PCOS, endometriosis and perimenopause. Your cycle on your Apple Watch and lock screen. Pro is 3.99 a month with a seven day free trial, or 19.99 a year. You can also pay once and own it forever. Whichever you pick, the privacy is identical. We charge for depth of analysis, never for keeping your data safe. A NOTE ON WHAT THIS IS Caelyn is a personal cycle tracker, not a medical device. Predictions are estimates based on what you log, and they will sometimes be wrong. It should not be used as contraception. For anything that worries you, please talk to a doctor or nurse. Made for anyone who wants to understand their body without handing it over. Terms of Use: https://rajeshpanta.github.io/caelyn/terms.html Privacy Policy: https://rajeshpanta.github.io/caelyn/privacy.html

Screenshots

Gym Log+4 screens
Caelyn4 screens

Verdict

The call

The clearest difference is review sentiment: Caelyn at 100% against Gym Log+'s 64%. Caelyn also leads on rating (5.0 vs 4.5) and iOS requirement (17.0 vs 26.0). Gym Log+'s advantage is ratings volume (699 vs 2). On price, update cadence, 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. Gym Log+ sells 4 in-app purchases, starting at $4.99 per month and Caelyn sells 3 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

Caelyn holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Gym Log+ has 699 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 64% of Gym Log+'s written reviews are positive against 100% of Caelyn's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Gym Log+ versus Caelyn: the parameters behind the verdict, then further details
ParameterGym Log+Caelyn
PriceFreeFree
Rating4.5 (699 ratings)5.0 (2 ratings) — better
Positive reviews64.2% of reviews100.0% of reviews — better
Number of ratings699 — better2
Update frequencyEvery 2 daysEvery 2 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS26.017.0 — better
Further details — not scored
Size124 MB10 MB
Age rating17+12+
DeveloperMinds Aspire, LLCRajesh Panta

Customer experience

Gym Log+

All ratings699 ratings
Positive88.3%
Neutral4.4%
Negative7.3%
Written reviews260 reviews
Positive64.2%
Neutral7.3%
Negative28.5%

Caelyn

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Gym Log+

Reported bugs

5 issues
  • Workouts disappearing or reverting
  • Inability to delete or edit individual sets
  • Keyboard issues when editing exercise notes
  • Sync problems between iPhone and Apple Watch
  • Crashes and black screen issues after updates

Requested features

6 requests
  • Add ability to edit order of exercises
  • Implement cloud sync between devices
  • Improve Apple Watch app functionality
  • Expand exercise database with more options
  • Add ability to track duration-based exercises
Show 1 more
  • Improve workout summary and history features

Caelyn

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Gym Log+

Subscriptions2
  • Pro Monthly$4.991 Month
  • Pro Yearly7 Days trial$29.991 Year
One-time2
  • Upgrade$79.99
  • Pro Lifetime$79.99
3 purchases

Caelyn

Subscriptions2
  • Pro Monthly7 Days trial$3.991 Month
  • Pro Yearly$19.991 Year
One-time1
  • Pro Lifetime$99.99

Questions

Is Gym Log+ free?
Gym Log+ is free to download, with in-app purchases available.
Is Caelyn free?
Caelyn is free to download, with in-app purchases available.
Which has better reviews, Gym Log+ or Caelyn?
Caelyn is rated higher. Gym Log+ averages 4.5 out of 5 from 699 ratings, while Caelyn averages 5.0 from 2 ratings.
Do Gym Log+ or Caelyn have ads?
Neither Gym Log+ nor Caelyn shows ads.
Which is updated more often, Gym Log+ or Caelyn?
Gym Log+ ships an update every 2 days, and Caelyn every 2 days. Most recently, Gym Log+ was updated on November 6, 2026 and Caelyn on November 5, 2026.

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