Comparison

HabitStar vs Studio PDF

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

Head to head
About

HabitStar

This app helps you track habits, routines, and goals with easy-to-use counters and visual statistics. Log daily activities, capture moments with photos, and set motivational goals to build positive behaviors. It's designed for personal growth and documenting life's significant events.

Highlights
  • Track occurrences with a quick counter
  • Log events with photos
  • Set and collect stars for goals
  • Visual calendar and history tracking
  • Detailed statistics and heat maps
  • Archive completed tasks
Features
Read full description

A counter that can track occurrences, useful for habit formation, check-ins, and statistics. You can track: Water intake, reading, early bedtimes, outings, private events, kisses, hugs, cooking, hair washing, bubble tea consumption, exercise, and more. For study and work: Writing a diary, doing homework, recording work hours, task count, courses, articles read, gym workouts. For children's habit formation: Language development, learning, reward points, candy consumption, and healthy growth. In daily life, take a photo to document: The growth stages of your plants, food you’ve eaten, physical books read, significant places you visit repeatedly, and observe their changes over time. Books read, and small, meaningful moments in life—repetitive yet significant events. Now you can digitize and save them, making these meaningful moments visual! Product Features: Track occurrences: Easy and quick counter operation Photo logging: Capture each event in a photo Set Star Wishes: Set small goals with a sense of ritual, collect stars to motivate yourself to achieve goals Calendar tracking: Visual tracking of each record History records: Track the changes from day to day Full-screen counting: Convenient for frequent counting tasks Archive settings: Mark tasks as completed for easier management Statistics: Visualize data with task statistics, time periods, heat maps, pie charts—keep control of your information Data supplement: You can add data to the calendar at any time VIP Auto-Renewal Subscription Details: Subscription periods: 1 month (VIP), 1 year (VIP) Subscription prices: Continuous monthly VIP at $0.99/month; Continuous yearly VIP at $3.99/year Payment: Charges are made via your iTunes account after confirmation of purchase Cancel renewal: To cancel renewal, manually turn off auto-renewal in iTunes/Apple ID settings 24 hours before the current subscription period ends Renewal: Apple will charge the iTunes account 24 hours before the current subscription expires, and the subscription period will be extended for another cycle Terms of Service: http://www.livecnt.com/#/termsEn Privacy Policy: http://www.livecnt.com/#/privacyEn Technical Support: http://www.livecnt.com/#/supportEn

About

Studio PDF

Features
Read full description

Studio PDF: A powerful toolbox, right in your pocket. Studio PDF is the ideal tool for handling your documents with ease and security. Unlike online alternatives, our app processes all your files locally on your iPhone. Your documents never leave your device: no servers, no cloud, total privacy. Why choose Studio PDF? Experience absolute privacy with no account required and zero data collection. Our native interface is designed specifically for iOS to ensure smooth performance, even with heavy documents. You get essential tools in one secure and elegant location. Your essential tools: Our page organizer allows you to reorder, rotate, or delete pages instantly with a single gesture. You can also merge multiple PDF files into one clean and structured document. For your security, add strong passwords to protect sensitive data from unauthorized access. Upgrade to the Pro version for unlimited access to merging and protection features, and enjoy a premium experience.

Screenshots

HabitStar4 screens
Studio PDF4 screens

Verdict

The call

The clearest difference is update cadence: Studio PDF at every 4 days against HabitStar's every 8 days. HabitStar's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 17.0). On price, 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. HabitStar sells 6 in-app purchases, starting at $2.99 per month and Studio PDF sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HabitStar ships an update every 8 days, Studio PDF every 4 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
HabitStar versus Studio PDF: the parameters behind the verdict, then further details
ParameterHabitStarStudio PDF
PriceFreeFree
Rating4.3 (18 ratings) — better—
Positive reviews85.2% of reviews—
Number of ratings18 — better—
Update frequencyEvery 8 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size123 MB4 MB
Age rating4+4+
Developer旷 张Simon DECAESTECKER

In-app purchases

6 purchases

HabitStar

Subscriptions2
  • Monthly$2.991 Month
  • Yearly7 Days trial$5.991 Year
One-time4
  • Unlock Phase 1 stars in Starrealm$2.99
  • Unlock Phase 2 stars in starArea$3.99
  • Life-time$7.99
Show 1 more
  • Life-time$9.99
1 purchases

Studio PDF

One-time1
  • Studio PDF Pro - Lifetime$3.99

Questions

Is HabitStar free?
HabitStar is free to download, with in-app purchases available.
Is Studio PDF free?
Studio PDF is free to download, with in-app purchases available.
Do HabitStar or Studio PDF have ads?
Neither HabitStar nor Studio PDF shows ads.
Which is updated more often, HabitStar or Studio PDF?
HabitStar ships an update every 8 days, and Studio PDF every 4 days. Most recently, HabitStar was updated on November 4, 2026 and Studio PDF on October 31, 2026.

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