Comparison

Formulair vs Skilltree

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

Head to head
About

Formulair

This app helps perfumers organize raw materials and create fragrance formulas. It allows detailed tracking of ingredients, dilutions, and costs, with tools for scaling and visualizing scent profiles. Export your creations in various formats for sharing or further analysis.

Highlights
  • Raw material organization with detailed cards
  • Formula creation and management
  • Customizable scaling engine
  • Fragrance pyramid and category visualization
  • Dilution tracking and management
  • Formula export to PDF, Markdown, TSV
  • Color-coding for raw materials
Features
Read full description

Designed for apprentice and self-taught perfumers. As easy as using a pen and paper but allows you to make connections between raw materials and formulas which a traditional notebook can't provide. Keep your raw materials organised with collection of cards to store information. Keep track of basic information such as supplier, IFRA limits and cost per gram. Add dates for purchasing your stock and making dilutions to act as a reminder to when raw materials may have gone off. A table summarising concentration in formulas serves to quickly remind you which usage levels you found the most success with. Organise your formulas into custom categories and sketch out new ones with ease. Simply search your raw materials library and set a weight in grams up to 3 decimal places. Mark formula entries as too strong or weak. Change the dilution of a formula entry or swap out a raw material as you please. Formulair makes all of this quick and easy. Features: - A custom scaling engine helps you scale formulas up and down using a scaling factor, target weight or target concentration. - View a fragrance pyramid split into 5 levels of substantivity and a visual raw material category breakdown for each formula. - Keep track of different raw materials' dilutions and change dilutions in formulas using the existing solvent. - Includes a setting to scramble your raw material usage table, hiding sensitive formula information. - Your data is secured by apple in a private iCloud container. - Featuring a carefully designed colour palette, allowing you to assign colours to fully capture the essence your raw materials. - A rich interface supports light and dark mode. Even the raw materials colour palette adapts dynamically. - Raw material cards include a listing of every formula it's used in from strongest to weakest, showing any flags you set for too strong or weak. - Export formulas to pdf allowing you to print and share, markdown to open in note taking software, or tsv (tab-separated value) files, to load into spreadsheet software. Pricing: Formulair allows you to add up to 25 raw materials and up to 25 formulas for free. Once you try to go above this limit, you will be offered a one-time in-app-purchase to buy the full version, which allows you to create unlimited raw materials and formulas.

About

Skilltree

Transform your life into a game with a unique skill tree system. Build positive habits, boost confidence, improve focus, and achieve your goals with gamified progress tracking, rewards, and social competition.

Highlights
  • Real-life skill tree for self-development
  • Gamified or minimalist design modes
  • Effortless habit tracker with clear goals
  • Routines for habit building
  • Social features and leaderboards
  • Advanced analytics for engagement
  • Community support
Features
Read full description

Skilltree is a video game skill tree for real life that makes self-improvement easy. Start positive habits, feel more confident, improve your focus, achieve a new year's resolution, get fit, avoid burnout, or help manage ADHD. Skilltree gives you the COMPLETE guide to changing your life, starting from 1-minute goals all the way up to improving your relationships, building a business, quitting video games and social media, and improving your health. Turn your life into a game with levels, XP, rewards, and achievements, and compete with your friends for glory! Download Skilltree and level up IRL! FEATURING: - A real-life SKILL TREE, showing you exactly which mental and physical habits to accelerate your self-development - A unique, and stunning design in either a gamified or minimalist mode so you can get engaged or stay laser-focused - An effortless and fun habit tracker with clear goals that slowly increase in difficulty - Routines to help you stick to your new habits and build new habit loops - Social features, including a leaderboard to compete with your friends and motivate each other to succeed - Advanced analytics to make self-improvement addictive and engaging - Not another boring habit tracker. Skilltree was made to feel engaging and unique - A community of thousands of people improving themselves around the world Skills include: - Meditation: to increase your levels of mindfulness and hone your focus - Journaling: to express yourself, develop new ideas, develop gratitude and more, - Reading: to focus your attention and learn powerful wisdom from the world's greatest thinkers - Fitness: to increase your discipline and build a body you're confident and proud of - Nofap: (this one doesn't need explaining....) - Nutrition: eating healthily and planning your meals out - Cold showers: for pushing yourself to your limits - Screentime: reduce your social media use/video game use/screentime - Sleep: Improve your sleep quality and restfulness - Routines: Build new routines to make habits effortless - Relationships: Build stronger relationships and improve your social skills - Studying: Build good study habits and learn new techniques such as using flashcards - And so much more! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Formulair4 screens
Skilltree4 screens

Verdict

The call

The clearest difference is update cadence: Skilltree at weekly against Formulair's every 3 weeks. Formulair's advantage is device support (4 vs 1). 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. Formulair sells 1 one-off in-app purchase and Skilltree sells 8 in-app purchases, starting at $5.99 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 — 4.8 for Formulair against 4.7 for Skilltree. Both are backed by a comparable volume of ratings — 190 and 286 respectively. Written reviews are what separate them: 87% of Formulair's written reviews are positive against 93% of Skilltree's.

UpkeepUpdate frequency

Formulair ships an update every 3 weeks, Skilltree weekly. Both last shipped on October 17, 2026.

Scorecard2 real differences · 8 level
Formulair versus Skilltree: the parameters behind the verdict, then further details
ParameterFormulairSkilltree
PriceFreeFree
Rating4.8 (190 ratings) — better4.7 (286 ratings)
Positive reviews86.8% of reviews93.2% of reviews — better
Number of ratings190286 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS15.0 — better16.4
Further details — not scored
Size3 MB67 MB
Age rating4+12+
DeveloperLux & Terra Ltd.Project Skill Tree

Customer experience

Formulair

All ratings190 ratings
Positive95.3%
Neutral1.6%
Negative3.2%
Written reviews53 reviews
Positive86.8%
Neutral0.0%
Negative13.2%

Skilltree

All ratings286 ratings
Positive94.4%
Neutral2.4%
Negative3.1%
Written reviews309 reviews
Positive93.2%
Neutral3.2%
Negative3.6%

User reviews

Formulair

From 190 App Store ratings

What we love

  • 👍 Easy to use interface
  • 💡 Powerful formula calculation
  • 🚀 Efficient organization of materials
  • 💰 Good value for money
  • ✨ Intuitive design

Room to improve

  • 💸 Expensive for some users
  • 🐛 Crashing when deleting categories/materials
  • 🤔 Lacks advanced features for some workflows
  • 🔄 No batch editing of items
  • 📂 Basic material import

Skilltree

From 286 App Store ratings

What we love

  • 👍 Helps build consistent habits
  • 🚀 Gamifies self-improvement
  • 💡 Innovative approach to tracking progress
  • 🎨 Clean and appealing design
  • 🤝 Motivating for community/friends

Room to improve

  • 🐛 Occasional bugs and glitches
  • 🔒 Issues with login and progress tracking
  • 🔒 Concerns about losing progress
  • 🔒 Monetization limits free features

Bugs and requests

Formulair

Reported bugs

5 issues
  • App does not open
  • Forgets license after purchase
  • Crashing when deleting material categories or materials
  • Syncing issues between laptop and iPad
  • Cannot remove imported materials all at once

Requested features

24 requests
  • Group formula raw materials by Top, Core, Base
  • Group product printing by Top, Core, Base
  • Allow sub-categories for formula grouping
  • Formula batch log for tracking batches and inventory
  • Copy images into notes fields
Show 19 more
  • General notes section not tied to material/formula
  • Incorporate/calculate accords in formulas
  • More color variations for app/categories
  • Image option to capture raw material appearance
  • Spanish version of the app
  • Additional fields like 'Manufacturer' or 'Country of Origin'
  • Option to add custom fields
  • Accord library option integrated into formulas
  • Extensive CSV library of raw materials for full version
  • Block information of raw materials
  • Export/import Excel data
  • Allow including created fragrances in new formulations
  • Edit printed items
  • Filter by FEMA
  • Ability to use on Windows computer
  • Pairing and correlation between raw materials
  • Save formulas for accords into other formulas
  • Add an ingredient that is treated as a base with its own formula
  • Make adding infusions and tinctures more convenient

Skilltree

Reported bugs

3 issues
  • Randomly logged out of the app
  • Greyed out habits/tasks not functioning
  • Paid features still locked after purchase

Requested features

4 requests
  • Ability to customize skill tree
  • More flexibility in task/habit management
  • Integrations with other productivity apps
  • Leaderboards and social features

In-app purchases

1 purchases

Formulair

One-time1
  • Full Version$39.99
8 purchases

Skilltree

Subscriptions3
  • Skilltree Premium7 Days trial$5.991 Month
  • Skilltree Premium7 Days trial$24.996 Months
  • Skilltree Premium3 Days trial$49.991 Year
One-time5
  • 50 Tokens$0.99
  • 150 Tokens$1.99
  • 500 Tokens$4.99
Show 2 more
  • 2000 Tokens$14.99
  • 5000 Tokens$69.99

Questions

Is Formulair free?
Formulair is free to download, with in-app purchases available.
Is Skilltree free?
Skilltree is free to download, with in-app purchases available.
Which has better reviews, Formulair or Skilltree?
Formulair is rated higher. Formulair averages 4.8 out of 5 from 190 ratings, while Skilltree averages 4.7 from 286 ratings.
Do Formulair or Skilltree have ads?
Neither Formulair nor Skilltree shows ads.
Which is updated more often, Formulair or Skilltree?
Formulair ships an update every 3 weeks, and Skilltree weekly. Most recently, Formulair was updated on October 17, 2026 and Skilltree on October 17, 2026.

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