Comparison

Rosyn vs Leaflog Journal

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

Head to head
About

Rosyn

This app helps cannabis users track their usage with intention and awareness. It visualizes tolerance shifts, allows quick logging of consumption methods and effects, and offers gentle suggestions for breaks. Designed for privacy, it keeps all data on the device.

Highlights
  • Private cannabis journaling
  • Tolerance visualization (moon cycle)
  • Quick logging of consumption and effects
  • Gentle suggestions for breaks
  • Data export option
  • On-device data storage
Features
Read full description

Meet Rosyn, a calm and private cannabis companion made for adult cannabis users who want to be more intentional about their use. Rosyn is not here to convince you to start using cannabis, use more, or quit. It is built for adults who already use cannabis and want a better way to understand their habits, learn from their experiences, and make more informed choices. Think of Rosyn as a budtender in your pocket, a personal cannabis journal, and a pattern finder all in one. Ask Rosyn about strains, terpenes, potency, methods, timing, and common effect patterns. Learn what myrcene, limonene, pinene, or caryophyllene may mean, and get plain-language context before your next session. Because cannabis is personal, Rosyn helps you go beyond generic strain descriptions. A strain that feels relaxing for one person may feel heavy, foggy, or distracting for someone else. With Rosyn, you can log what you used, how you used it, when you used it, and how it actually felt. Over time, your logs become a clearer picture of what works for you. You can track flower, vapes, edibles, tinctures, concentrates, topicals, and custom methods, along with potency, amount, mood, timing, effects, notes, and ratings. Rosyn also supports voice logging, so you can quickly describe a session without filling out every detail by hand. Say what happened, and Rosyn helps organize the important parts. As your history grows, Rosyn helps you notice patterns across strains, terpenes, methods, doses, moods, time of day, and effects. You may discover which products fit evenings better, which methods last longer than expected, or which routines are becoming more automatic than intentional. Rosyn can also help you understand tolerance changes over time. Tolerance can shift slowly, and it is easy to miss until cannabis no longer feels the way it used to. Rosyn compares your recent sessions with your own history so you can see when frequency, amount, or effectiveness may be changing. When it looks like you may need space, Rosyn can help you consider a pause, reset, or slower pace. No shame. No scare tactics. No pressure to quit. Just a gentle way to reflect and decide what feels right for you. Rosyn is made for adult cannabis users who want cannabis to stay helpful, intentional, and personal. Whether you use cannabis to unwind, get creative, sleep, manage discomfort, or simply be more present, Rosyn gives you a private place to track, reflect, and learn. Your cannabis history is personal, and Rosyn is designed with that in mind. There are no social feeds, public profiles, or judgmental streaks. Your logs are for you. If you choose, you can export your history for your own records or to share with someone you trust. Rosyn does not replace medical advice, professional care, or your own judgment. It simply helps you understand what you are using, how it feels, and what patterns are forming over time. Ask. Log. Learn. Adjust. Use cannabis with more intention. Download Rosyn and get to know your cannabis routine better. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Leaflog Journal

This app helps you privately log your cannabis experiences, track strains, and manage your stash. It offers a curated offline library and personalized charts to explore your data.

Highlights
  • Personal strain journal
  • Session logging with effect tags
  • Offline strain reference library
  • Stash tracking and management
  • Customizable data charts
  • Private and secure data storage
Features
Read full description

Leaflog is your personal journal for cannabis. Remember what you tried, how it felt, and what you'd choose again, with everything stored on your device and nowhere else. YOUR JOURNAL Build a personal record of every strain you've tried. Note the strain type, THC and CBD percentages, photos, and your own observations. Star your favorites, then search, filter, and sort your collection by name, rating, or how often you've returned to it. SESSION LOGGING Capture each session in seconds: the date, the method (flower, vape, edible, concentrate, tincture, or topical), the amount, and how it felt. Choose from twenty effect tags, rate the experience one to five stars, and add any notes worth keeping. A LIBRARY OF 300+ STRAINS Browse a curated, fully offline reference library: lineage, dominant terpenes with their aromas, typical effects, and flavor notes for each strain. Trying something from the library? Add it to your journal with one tap and the details fill themselves in. STASH TRACKING Keep tabs on what's on hand. Log each batch with its amount, potency, and terpene readings, then mark it finished when it's gone. Leaflog remembers how long it lasted, so you always know what's active and what's history. EXPLORER Build your own charts from your journal, the strain library, and your stash. Pick a source, a dimension, and a chart style, or start from ready-made cards like Top Rated and Sessions Per Month, then save the explorations you want to keep. LEAFLOG+ (OPTIONAL) An optional monthly subscription that automatically backs up your journal, end-to-end encrypted with keys only you hold. Leaflog's servers can never read it. Restore everything on a new iPhone with your recovery code or iCloud Keychain. Cancel anytime; your journal stays fully usable without it. New subscribers start with a 1-week free trial. PRIVATE BY DESIGN Leaflog collects nothing. No account, no sign-up, no analytics. Your journal lives in a database on your iPhone, photos included, and leaves it only if you turn on the optional end-to-end encrypted Leaflog+ backup, which is encrypted on your device so only you can ever read it. The camera is used only to capture photos you choose to add. A PERSONAL JOURNAL, NOTHING MORE Leaflog does not sell, source, or promote cannabis, and includes no way to obtain it. It is a notebook for adults who want to remember their own experience. Know and follow the laws where you live. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://leaflogjournal.com/privacy

Screenshots

Rosyn4 screens
Leaflog Journal4 screens

Verdict

The call

The clearest difference is in-app purchases: Leaflog Journal at none against Rosyn's 2. Leaflog Journal also leads on update cadence (every 4 days vs fortnightly). Rosyn's advantage is ratings volume (6 vs 1). On price, rating, 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. Rosyn sells 2 in-app purchases, starting at $9.99 per month. Leaflog Journal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Rosyn against 5.0 for Leaflog Journal. That said, the two scores are not equally well evidenced: Rosyn has 6 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Rosyn ships an update fortnightly, Leaflog Journal every 4 days. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

Scorecard4 real differences · 6 level
Rosyn versus Leaflog Journal: the parameters behind the verdict, then further details
ParameterRosynLeaflog Journal
PriceFreeFree
Rating5.0 (6 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings6 — better1
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.018.0
Further details — not scored
Size37 MB6 MB
Age rating17+17+
DeveloperMike Van AmburgNadir Saleh

Customer experience

Rosyn

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Leaflog Journal

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Rosyn

Subscriptions2
  • Rosyn Premium Monthly$9.991 Month
  • Rosyn Premium Yearly$99.991 Year
None

Leaflog Journal

No in-app purchases

Questions

Is Rosyn free?
Rosyn is free to download, with in-app purchases available.
Is Leaflog Journal free?
Leaflog Journal is free to download, with no in-app purchases.
Which has better reviews, Rosyn or Leaflog Journal?
Rosyn and Leaflog Journal are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.
Do Rosyn or Leaflog Journal have ads?
Neither Rosyn nor Leaflog Journal shows ads.
Which is updated more often, Rosyn or Leaflog Journal?
Rosyn ships an update fortnightly, and Leaflog Journal every 4 days. Most recently, Rosyn was updated on September 23, 2026 and Leaflog Journal on September 29, 2026.

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