Flex Log vs Felt
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Flex Log
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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 โ 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.
Felt
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Most mood trackers tell you what you felt. Felt shows you why: it learns which triggers lift or drag your mood, warns you when a rough stretch is forming, and celebrates when your week starts lifting. All of it 100% private and offline โ no account, no cloud, your feelings never leave your phone. Felt is a daily mood and emotion tracker built around one idea: naming your feelings precisely is itself good for you. Research by Dr. Lisa Feldman Barrett shows that people who use a richer emotional vocabulary recover faster, stress less, and have better mental health outcomes โ not as a result of therapy, but simply because of the naming. So we built a space to do exactly that, every day. THE MOODPRINT After each check-in, your entries are transformed into a six-axis emotional radar โ Calm, Happy, Energy, Focus, Social, Sleep โ grounded in Russell's Circumplex Model, the gold standard in affect science. Watch your week take shape. See the patterns you live inside but rarely notice. WHAT MAKES FELT DIFFERENT โ 9 core moods, carefully chosen to cover your full emotional range โ MoodPrint radar chart updates in real time as you log โ Pattern detection that spots rumination, volatility, and recovery trends โ Emotional Granularity Score โ tracks how your self-awareness grows over time โ No streaks. No guilt. No "you haven't logged in 3 days" shame nudges โ Notifications that feel like a gift, not a chore PATTERN DETECTION Felt quietly watches for patterns across your entries: rumination, volatility, emotional flatness, social withdrawal, concerning persistence, and โ the one worth celebrating โ recovery. When your week is genuinely lifting, you'll know why. BUILT WITH YOUR SAFETY IN MIND Heavy feelings deserve more than an algorithm. When your notes suggest acute distress, Felt steps back โ suppressing notifications, never adding pressure, and gently pointing toward real support when it matters. YOUR DATA STAYS YOURS All analysis runs on-device. Your journal never leaves your phone. Felt is not therapy. It is not a diagnosis tool. It is a daily practice of noticing yourself โ and noticing is where change begins. SUBSCRIPTION Full access to Felt requires a subscription. Felt Premium unlocks MoodPrint analytics, pattern detection, and unlimited history. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Terms of Service: https://felt.am1rft.com/terms-of-service.html Privacy Policy: https://felt.am1rft.com/privacy-policy.html
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Verdict
The clearest difference is in-app purchases: Flex Log at none against Felt's 7. Flex Log also leads on iOS requirement (12.4 vs 18.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Felt sells 7 in-app purchases, starting at $4.99 per 7 days. Flex Log asks for nothing beyond the download.
Flex Log ships an update every 5 days, Felt every 4 days. The most recent releases landed on September 15, 2026 and September 20, 2026 respectively.
| Parameter | Flex Log | Felt |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.4 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 18 MB | 21 MB |
| Age rating | 17+ | 12+ |
| Developer | Aaron Larner | Amirmahdi Fathi |
In-app purchases
Flex Log
No in-app purchases
Felt
- Felt Pro Weekly$4.997 Days
- Felt Pro Monthly$9.991 Month
- Felt Pro Annual$19.991 Year
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- Felt Pro Annual7 Days trial$39.991 Year
- Felt Pro Annual1 Year trial$39.991 Year
- Felt Pro Annual$39.991 Year
- Felt Pro Lifetime$99.99









