Comparison

HabiTimer vs PDFOptim

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

Head to head
About

HabiTimer

This app provides customizable daily reminders for frequent tasks. Set alarms for medications, breaks, meals, or any habit you want to track. Notifications work even when the app is not active, ensuring you never miss a task.

Highlights
  • Customizable daily reminders
  • Background notifications
  • Flexible alarm scheduling
  • Task postponement feature
  • Individual and master alarm control
  • Repeat daily until changed
Features
Read full description

HabiTimer is a unique tool that alerts you throughout the day when you need to do tasks such as take medications or supplements, take work breaks, eat small meals as part of a weight loss or fitness program, or anything you want reminders to do frequently. ••• Notifications trigger at any time, even when HabiTimer isn't active! ••• PLEASE NOTE: If notifications aren't triggering, then check Settings App > Notifications > HabiTimer. • Any number of alarms! • Simply swipe your finger across the alarm screen to set or remove as many triggers per alarm as you wish! Swipe vertically to set triggers every hour, or horizontally to set triggers every 15 minutes! • Need to put off a task? Just "nudge" all the triggers using the arrow buttons— all the triggers move together, back or forth 15 minutes, or up or down an hour! • Turn each alarm on or off individually, or all alarms together using the master switch! • Notifications repeat every day at the same time until you change them or turn them off. “We are what we repeatedly do. Excellence, then, is not an act, but a habit.” —Aristotle

About

PDFOptim

Easily compress and optimize PDF files on your iPhone and iPad. Reduce the size of large documents, saving storage space and transmission time. Offers both automatic and manual compression modes with advanced settings for image and vector graphics.

Highlights
  • Compress PDF documents
  • Optimize PDF files
  • Automatic compression mode
  • Manual compression mode
  • Adjust image resolution and quality
  • Optimize vector graphics
  • Support for password-protected PDFs
Features
Read full description

PDFOptim is a simple and intuitive way to compress, optimize and reduce PDF documents on iPhones and iPads. PDFOptim provides easy and effective ways to compress large image and graphics heavy PDF files. Inbuilt side-by-side preview to compare original and compressed PDF. * * * PDFOptim for Mac is also available on the Mac App Store. * * * Compressed PDF documents requires less disk space for storage and faster uploads and downloads saves transmission time and cost. PDFOptim rewrites the entire PDF documents using selected compression options as efficiently as possible without compromising the document's integrity. If your PDF documents are in another app (For Example Mail, DropBox or SkyDrive etc.) that uses the Open In… button, tap the button to open the PDF document in PDFOptim. You can also transfer PDF documents from your desktop computer via iTunes into PDFOptim application on your iPhone or iPad. KEY FEATURES: AUTO COMPRESSION MODE - PDFOptim analyze document’s contents and apply algorithm to generate a smallest possible PDF by maintaining the document’s visual quality. Choose one of the four predefined Auto compression methods and let the app do the hard work for you. No further user interaction required to provide technical compression options. MANUAL COMPRESSION MODE - Change compression options manually to generate optimum sized PDF of your need. You can choose compression options to set from Image Color Model, Image Resolution, JPEG Image Quality, Optimise vector graphics level and Advance option. - Image color model to choose from RGB, Gray and Mono. Selecting Monochrome color model option converts raster PDF contents into black and white which helps reduces PDF file size to greater extent. It is very helpful when compressing scanned books mainly containing text. - Image resolution ppi (pixels/inch) control to resize raster image contents. Downsampling at lower resolution decrease the file size dramatically. - Quality control. Set quality from lossless to least for resampling all raster images into PDF. It allows you to control compressed PDF size and viewing quality. -Advance options to remove PDF content properties like alternate images, page thumbnails, documents structure hierarchy and output intent. - Optimize vector graphics option removes superfluous information to reduce vector graphics heavy PDF. Increase in optimize vector from 'Level 1' to 'Level 5' reduces output PDF file size less to more respectively. This option is very useful when PDF content mainly consist of high precision vector graphics, Usually PDF drawing, note-taking and PDF markup apps creates large vector graphics heavy PDF files which can be compressed by this option efficiently. - Password protected PDF documents supported for compression using correct password. - Single or multiple compressed PDFs can be shared as single ZIP (*.zip) file. - Allows Compressed PDFs to Open In… another application, Mail, Message, Print, share PDFs to nearby iOS devices via AirDrop. - Use Copy to iTunes to save and share compressed PDFs on your desktop computer. PDF VIEWER: - Inbuilt PDF viewer with fully selectable and searchable text contents. Select and copy text to clipboard for further use. - Pinch out and Pinch in to ZoomIn and ZoomOut view and search feature to find a character, word and sentence. - Scroll through your document by thumbnail view or Go to page feature. Note: PDFOptim is standalone application running natively to compress PDF documents securely on your iOS device. You can refer User Manual for any assistance Or Contact Support. *The free version has limitation to export one compressed PDF per week. Get Premium to remove all restrictions and start exporting an unlimited number of compressed PDFs. Privacy Policy: http://rootrisetech.com/pdfoptim-privacy-policy Terms of Use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HabiTimer4 screens
PDFOptim4 screens

Verdict

The call

The clearest difference is price: PDFOptim at Free against HabiTimer's $0.99. PDFOptim also leads on update cadence (every 5 months vs every 28 months) and ratings volume (292 vs 9). HabiTimer's advantage is in-app purchases (none vs 3) and rating (4.9 vs 4.7). On review sentiment, ads and iOS requirement 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

PDFOptim is free to download; HabiTimer costs $0.99 up front. PDFOptim sells 3 in-app purchases, starting at $0.99 per month. HabiTimer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HabiTimer holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: PDFOptim has 292 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 79% of HabiTimer's written reviews are positive against 76% of PDFOptim's.

UpkeepUpdate frequency

HabiTimer ships an update every 28 months, PDFOptim every 5 months. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 3 level
HabiTimer versus PDFOptim: the parameters behind the verdict, then further details
ParameterHabiTimerPDFOptim
Price$0.99Free — better
Rating4.9 (9 ratings) — better4.7 (292 ratings)
Positive reviews79.2% of reviews — better75.6% of reviews
Number of ratings9292 — better
Update frequencyEvery 28 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.6 — better
Further details — not scored
Size19 MB8 MB
Age rating4+4+
DeveloperArciem LLCRootRise Technologies Pvt. Ltd.

Customer experience

HabiTimer

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews48 reviews
Positive79.2%
Neutral6.3%
Negative14.6%

PDFOptim

All ratings292 ratings
Positive93.5%
Neutral1.7%
Negative4.8%
Written reviews82 reviews
Positive75.6%
Neutral3.7%
Negative20.7%

Bugs and requests

HabiTimer

Not enough reviews yet to summarise bugs or requests.

PDFOptim

Reported bugs

11 issues
  • App not launching on iOS 18.0.1
  • App freezes during launch
  • App won't take purchases
  • Cannot optimize certain PDFs
  • Compression not effective on marked-up PDFs
Show 6 more
  • App no longer works after updates
  • File compressed to a slightly smaller size with no significant reduction
  • Graphics become unreadable or highly degraded
  • App crashes
  • Multitasking, drag and drop not working
  • Doesn't use full screen on new iPads

Requested features

6 requests
  • Support for iOS shortcuts
  • macOS version integration/cross-platform compatibility
  • Improved handling of specific file types like GoodNotes
  • Better optimization for handwritten notes within PDFs
  • Cloud storage for compressed documents (iCloud)
Show 1 more
  • Update for latest OS versions and multitasking features

In-app purchases

None

HabiTimer

No in-app purchases

3 purchases

PDFOptim

Subscriptions2
  • Premium : Monthly Access$0.991 Month
  • Premium : Yearly Access3 Days trial$2.991 Year
One-time1
  • Premium : Lifetime Access$4.99

Questions

Is HabiTimer free?
HabiTimer costs $0.99, with no in-app purchases.
Is PDFOptim free?
PDFOptim is free to download, with in-app purchases available.
Which has better reviews, HabiTimer or PDFOptim?
HabiTimer is rated higher. HabiTimer averages 4.9 out of 5 from 9 ratings, while PDFOptim averages 4.7 from 292 ratings.
Do HabiTimer or PDFOptim have ads?
Neither HabiTimer nor PDFOptim shows ads.
Which is updated more often, HabiTimer or PDFOptim?
HabiTimer ships an update every 28 months, and PDFOptim every 5 months. Most recently, HabiTimer was updated on October 16, 2026 and PDFOptim on October 14, 2026.

Other comparisons