Comparison

DECAY AI Subscription Tracker vs ZenPDF

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

Head to head
About

DECAY AI Subscription Tracker

Features
Read full description

Stop paying for subscriptions you no longer use. DECAY tracks every recurring charge in one place, shows what each one truly costs you per use, and helps you cancel the ones bleeding your wallet. Built around one brutal idea: most monthly bills are dead money. DECAY proves it with cost per use math, then gives you the tools to act on it. Why people choose DECAY - One time purchase, never a monthly fee - Cost per use reveals the real price of every service - Free trial watchdog warns 7 days, 3 days, 1 day, and 2 hours before charging - Renewal reminders 3 days before every bill - AI written cancellation emails for any service - Bundle scanner finds overlapping streaming, cloud, or AI services - Monthly Dead Money Report names your worst offenders - Money Saved ticker celebrates every cancellation - Daily check in streak keeps tracking effortless Track everything in one place - Streaming, music, news, fitness, cloud, AI, software, memberships, donations - Multi currency with automatic conversion - Monthly, yearly, weekly, or custom billing cycles - Free trial countdowns and conversion alerts - Custom cost per use thresholds you control AI built in - Plain language explanation of every cost per use number - Smart category suggestions as you type - Worth It decision helper before subscribing to anything new - Receipt and email parser auto fills the form Designed for iPhone and iPad - Three column iPad layout with sidebar, list, and inspector - Keyboard shortcuts for power users - Pencil annotations on share cards - Drag and drop subscription management - Multi window support Privacy first - All data lives on your device and in your private iCloud container - No analytics, no third party trackers, no ads, no resale - Apple privacy label confirms Data Not Collected - Bring your own AI key for higher rate limits Take back control of your monthly bills. Pay once, own forever. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ZenPDF

Features
Read full description

ZenPDF is the all-in-one PDF toolkit that works completely offline. No account, no sign-up, no cloud uploads -- your files never leave your iPhone. Whether you're a student organizing notes, a professional handling contracts, or just trying to secure a document with a watermark, ZenPDF gives you every essential PDF tool in one clean, fast app. EVERY TOOL YOU NEED - Merge PDF -- Combine multiple PDFs into a single document. Reorder them exactly how you want before merging. Your original text and quality are preserved. - Compress PDF -- Shrink large PDFs to share them easily. Smart compression optimizes embedded images while keeping your text crisp and selectable. Pick the level that fits. - Edit Metadata -- View and update PDF document properties like Title, Author, Subject, and Keywords in a clean form. - Add Watermark -- Secure your documents with professional text watermarks on all pages. - Image to PDF -- Turn photos, screenshots, and pictures into a polished PDF in seconds. - Scan to PDF -- Use your camera to capture physical documents and save them straight to PDF. - Split PDF -- Pull out single pages or page ranges from any document. - Rotate Pages -- Fix sideways or upside-down pages, all at once or one at a time. - Built-in PDF Viewer -- Open and review your results without leaving the app. WHY ZENPDF - 100% offline -- everything is processed right on your device - No account, no login, no cloud - Text stays text -- we never flatten your PDF into a blurry image - Fast -- heavy work runs in the background so the app never freezes - Unlimited use -- no caps on how many files you merge, scan, or convert - Clean, modern interface with light and dark mode Your documents are yours. ZenPDF processes files locally and never sends their contents anywhere. Download ZenPDF and take control of your PDFs today.

Screenshots

DECAY AI Subscription Tracker4 screens
ZenPDF4 screens

Verdict

The call

The clearest difference is price: ZenPDF at Free against DECAY AI Subscription Tracker's $1.99. ZenPDF also leads on in-app purchases (none vs 1) and iOS requirement (13.0 vs 18.6). DECAY AI Subscription Tracker's advantage is ads (none vs shown). On 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

ZenPDF is free to download; DECAY AI Subscription Tracker costs $1.99 up front. DECAY AI Subscription Tracker sells 1 one-off in-app purchase. ZenPDF asks for nothing beyond the download.

Scorecard4 real differences ยท 2 level
DECAY AI Subscription Tracker versus ZenPDF: the parameters behind the verdict, then further details
ParameterDECAY AI Subscription TrackerZenPDF
Price$1.99Free โ€” better
Update frequencyEvery 2 monthsโ€”
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS18.613.0 โ€” better
Further details โ€” not scored
Size3 MB62 MB
Age rating4+4+
DeveloperAneesh PradeepHaileslassie Lilay Desalegn

In-app purchases

1 purchases

DECAY AI Subscription Tracker

One-time1
  • DECAY Pro Unlock$9.99
None

ZenPDF

No in-app purchases

Questions

Is DECAY AI Subscription Tracker free?
DECAY AI Subscription Tracker costs $1.99, and also offers in-app purchases.
Is ZenPDF free?
ZenPDF is free to download, with no in-app purchases.
Do DECAY AI Subscription Tracker or ZenPDF have ads?
ZenPDF shows ads; DECAY AI Subscription Tracker does not.

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