Comparison

Flex Log vs TriLog

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

Head to head
About

Flex Log

Features
Read full description

Welcome to Flex Log, the app for anyone who's ever thought, "If only I could track my productivity hacks... with another productivity hack." It's like your standard health and productivity app, but without the rigid frameworks and one-size-fits-all approach. It's adaptable to fit the way you track. Why Flex Log? Because who doesn't love tracking their life with an app? Flex Log brings a bit of order to your chaotic world, with the added bonus of making you feel like a productivity guru. It's the app for people who love data, but also value simplicity and ease of use in their everyday life. For the Aspiring Life Optimizers: You're the kind of person who tries to squeeze productivity out of every second (while listening to podcasts you swear you'll apply to your life someday). Flex Log is here to help you track, well, whatever you think is worth tracking. No judgments here! Customize Without the Complexity: Our app is more adaptable than your yoga instructor. Want to track your caffeine intake or the number of times you actually remember to water your plants? Flex Log has got your back. Built with the power-user in mind, so you can dive deep into customization, creating a setup that's as complex and unique as your goals. Join Our Band of Happy Trackers: Download Flex Log and become part of a community that loves to optimize their lives, but also knows how to laugh at the little absurdities. Remember, life's a journey – might as well have an app that makes the ride more interesting. Flex Log: Your Life, Tracked Your Way (With a Smile). Features: - Quick data entry - Task tracking - User defined activities with custom icons - Point in time as well as time range tracking - Custom fields so you can track anything in a structured format - Data never leaves your phone - Customized views Coming soon: - Recurring tasks based on calendar or last completion date - Reminder notifications - Voice entry with siri and google assistant - Data sync to notion or google sheets - Goals and charts. Visualize what's most important.

About

TriLog

Log mood, energy, and symptoms moment-by-moment to see how they correlate with sleep, weather, and habits. Visualize your week hour-by-hour on a single timeline. Designed for serious self-trackers who need detailed insights.

Highlights
  • Moment-by-moment data capture
  • Hour-by-hour timeline visualization
  • Correlation with sleep, weather, habits
  • Customizable forms for logging
  • Experiment tracking (Trials)
  • Provider reports (PDF export)
  • Interactive dashboards
Features
Read full description

TriLog is the personal data logger. Capture mood, energy, focus, and symptoms in seconds — then see how they line up with sleep, weather, habits, and everything else on one timeline. Most trackers ask once a day how you felt, then average it. But the crash hits at 2pm. The migraine lasts four hours. The good morning follows a bad night. TriLog records moments, not daily summaries: every entry has a time, and a whole week sits on one screen, hour by hour. Built for people who already track seriously — energy you have to budget, symptoms nobody can explain, experiments you're running on yourself — and who have outgrown mood journals, spreadsheets, and scattered notes. NEW IN 4.0 • Notes view — every note, tracker entry, and dose from the week in one place. Filter it, or flip to a two-week time-of-day chart. • Forms — log several fields as one entry: a pain episode, a bowel event, a restaurant visit. Start from a template or build your own. • Trials — run an experiment (magnesium, no afternoon coffee), mark the days you missed, then end it Adopted, Dropped, or Inconclusive. • Episode trackers — a headache with a start, a severity, and a stop, drawn as a band for as long as it lasted. • Provider Report — a printable PDF of your sleep, energy, trackers, and forms to bring to an appointment. • Interactive dashboards — export the week chart or your metrics as a web page and explore months on a big screen. • Trio view — a week chart with the three columns you choose. CAPTURE IN SECONDS Capture has to be effortless or it won't survive a hard week. • One tap each for mood, energy, and activity • Quick Track — leave it open and log with single taps • Type a line — "t hd 3", "int coffee" — with your own shorthand • Siri — "energy 3", "mood sad" • Long-press any chart to log at that time; drag a marker to re-time it EVERYTHING ON ONE CLOCK Your entries sit alongside weather, barometric pressure, pollen, air quality, and daylight; Apple Health sleep stages, HRV, resting heart rate, steps, and workouts; and hour-by-hour Screen Time. Did this week feel worse because of sleep, pressure, screen time, or something you took on Tuesday? WHAT YOU CAN LOG • Mood, energy, and activity throughout the day • Notes — meals with calories, health, journal, cycle • Trackers — ratings, numbers, choices, episodes, traffic lights, titled ratings • Intake — coffee, supplements, medications, with caffeine totaled in mg • Day Launch and Day End — sleep, goals, reflections, routines • Habits — daily checkmarks, no streaks, no scores SEE WHAT LINES UP • Week chart — seven days, twenty-four hours, one screen • Day view, Notes view, and Trio view • Journal — your journal notes and Day End reflections, collected day by day with photos • Metrics grid — sleep, energy, weather, steps, trackers, and trials by day • Analysis — patterns, day ratings, correlations, intake and cycles against your ratings • Free, open-source Mac and Windows viewer PRIVATE BY DEFAULT No account. No third-party servers. No ads. Your log lives on your device, with optional iCloud backup. Export everything, anytime. ONE PRODUCT, NO TIERS Try everything free for 30 days. Then $59.99/year or $7.99/month to keep logging. Cancel during the trial and pay nothing. If you stop subscribing, the app becomes read-only — everything you logged stays browsable and exportable. Demo Mode (Menu → About) lets you explore with sample data first. A LOGBOOK, NOT A DOCTOR TriLog records and displays. It does not diagnose, treat, or give medical advice. If you find a pattern that matters, bring it to a qualified professional. Questions or ideas? I read every email: support@trilog.app Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex Log4 screens
TriLog4 screens

Verdict

The call

The clearest difference is in-app purchases: Flex Log at none against TriLog's 2. Flex Log also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (12.4 vs 16.0). On price, ads and device support 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. TriLog sells 2 in-app purchases, starting at $7.99 per month. Flex Log asks for nothing beyond the download.

UpkeepUpdate frequency

Flex Log ships an update every 5 days, TriLog every 3 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Flex Log versus TriLog: the parameters behind the verdict, then further details
ParameterFlex LogTriLog
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.4 — better16.0
Further details — not scored
Size18 MB54 MB
Age rating17+4+
DeveloperAaron LarnerJoseph Orr

In-app purchases

None

Flex Log

No in-app purchases

2 purchases

TriLog

Subscriptions2
  • TriLog Pro1 Month trial$7.991 Month
  • TriLog Pro1 Month trial$59.991 Year

Questions

Is Flex Log free?
Flex Log is free to download, with no in-app purchases.
Is TriLog free?
TriLog is free to download, with in-app purchases available.
Do Flex Log or TriLog have ads?
Neither Flex Log nor TriLog shows ads.
Which is updated more often, Flex Log or TriLog?
Flex Log ships an update every 5 days, and TriLog every 3 weeks. Most recently, Flex Log was updated on November 8, 2026 and TriLog on November 5, 2026.

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