Comparison

PDF Size Reducer vs SlangDecoder

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

Head to head
About

PDF Size Reducer

Easily scan documents, convert images and text to PDF, and manage your files on the go. This app offers essential tools for creating, editing, and signing PDFs with a simple interface.

Highlights
  • Scan documents to PDF
  • Convert images and text to PDF
  • Convert PDFs to images and Word documents
  • Merge and split PDF files
  • Compress PDF size
  • Add watermarks and signatures
  • Secure and share PDFs
Features
Read full description

Merge, compress, split and sign PDFs on your iPhone. Turn photos, Word and Excel files into PDFs in seconds. No account, no upload, no sign-up. PDFBuddy does the everyday PDF jobs properly and gets out of the way. Pick a tool, pick your file, done. MERGE, SPLIT AND SHRINK • Merge several PDFs into one, in the order you choose • Split a long PDF into separate files or page ranges • Compress a PDF that is too large to email • Turn PDF pages back into photos CONVERT ANYTHING TO PDF • Photos and camera scans • Word documents (.doc, .docx) and rich text • Excel and CSV spreadsheets • Plain and formatted text • Any web page, from a link SCAN AND COPY • Scan paper documents with the camera, then crop, filter, sign or watermark each page • ID Scan copies both sides of an ID card or driver's license, or a passport photo page, onto one A4 page at its real printed size • Smart erase brushes out pen marks and stray ink, with undo SIGN WITHOUT PRINTING • Draw a signature once and reuse it • Place it anywhere, resize it, set the opacity • Save the signed copy alongside the original PROTECT WHAT YOU SEND • Lock a PDF with a password • Add a watermark across every page • Auto-redact finds card numbers, phone numbers, emails and addresses, shows you the page exactly as it will look, then deletes the text from the file rather than drawing a box over it READ TEXT OFF A PAGE • Scan a passport or ID card and get the details as text • Photo to text turns a handwritten or printed page into editable text, or a clean typed PDF • Table to Excel points the camera at a table and gives you a spreadsheet TOOLS THAT READ FOR YOU • Read aloud plays a document back with the sentence highlighted as it reads • Summarize gives you the short version, the action items, the dates and the people named • Smart naming names a scan from what is actually on the page EVERYTHING STAYS ON YOUR PHONE Text recognition, redaction and the AI tools all run on the device. Nothing you scan, sign or redact is uploaded, and there is no account to create. WORKS IN YOUR LANGUAGE English, Spanish, French, German, Italian, Dutch, Portuguese, Russian, Japanese, Korean and Chinese. FREE AND PRO Every tool is free to try, with 7 free documents every 30 days. Pro removes the limit and the ads. Pro is available as a weekly, monthly or yearly subscription. The price for your region is shown in the app before you buy. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of that period. Manage or cancel your subscription in Account Settings after purchase. Terms of Use: https://sites.google.com/view/appvista-terms-of-use/home Privacy Policy: https://sites.google.com/view/appvista-privacy-policy/home

About

SlangDecoder

Features
Read full description

Do your kids text in another language? Finally — a translator built for parents. Slang Decoder instantly converts the phrases, words, and expressions your teens use every day into plain English you can actually understand. Type a phrase you saw in a text message, overheard at dinner, or found in a social media post — and Slang Decoder will translate it, explain every term, flag anything concerning, and even write conversation starters to help you talk to your teen naturally. WHAT YOU GET • Plain-English translation of the full phrase or message • Word-by-word breakdown of every slang term • 4-level concern meter: All Clear / Heads Up / Pay Attention / Act Now • Conversation starters — natural openers the app writes for you when something is flagged, so you can talk to your teen without the confrontation • Share results in one tap — send the full analysis to your co-parent, school counselor, or therapist via Messages, Mail, AirDrop, and more • Voice input — heard something but not sure how to spell it? Tap the mic and say it POWERED BY ADVANCED AI Unlike apps with static dictionaries that go out of date, Slang Decoder uses live AI to understand context, nuance, and the latest slang as it evolves — so it's always current. WHAT PARENTS ARE DECODING "no cap that rizz was bussin fr fr" → "Honestly, that charm was amazing, for real" — All Clear "she's been vaping on the down low, don't snitch" → flagged with concern guidance and conversation starters "he's always geeked at parties, total plug" → flagged with direct conversation openers ONE-TIME PURCHASE $3.99 — no subscription, no ads, no in-app purchases. Pay once, own it forever. YOUR PRIVACY MATTERS Slang Decoder does not store your searches, share your data, or require an account. Everything is processed securely and anonymously. Perfect for parents, grandparents, teachers, school counselors, and anyone trying to stay connected to the young people in their lives. Translate teen slang into plain English — with a concern meter, AI-written conversation starters, and one-tap sharing.

Screenshots

PDF Size Reducer4 screens
SlangDecoder4 screens

Verdict

The call

The clearest difference is price: PDF Size Reducer at Free against SlangDecoder's $2.99. PDF Size Reducer also leads on update cadence (every 8 days vs every 2 months). SlangDecoder's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support 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

PDF Size Reducer is free to download; SlangDecoder costs $2.99 up front. PDF Size Reducer sells 3 in-app purchases, starting at $1.99 per 7 days. SlangDecoder asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Size Reducer ships an update every 8 days, SlangDecoder every 2 months. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
PDF Size Reducer versus SlangDecoder: the parameters behind the verdict, then further details
ParameterPDF Size ReducerSlangDecoder
PriceFree — better$2.99
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 8 days — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better17.0
Further details — not scored
Size22 MB4 MB
Age rating4+4+
DeveloperApp Vista StudioGreg Anderson

In-app purchases

3 purchases

PDF Size Reducer

Subscriptions3
  • Weekly Plan3 Days trial$1.997 Days
  • Monthly$2.991 Month
  • Yearly$19.991 Year
None

SlangDecoder

No in-app purchases

Questions

Is PDF Size Reducer free?
PDF Size Reducer is free to download, with in-app purchases available.
Is SlangDecoder free?
SlangDecoder costs $2.99, with no in-app purchases.
Do PDF Size Reducer or SlangDecoder have ads?
PDF Size Reducer shows ads; SlangDecoder does not.
Which is updated more often, PDF Size Reducer or SlangDecoder?
PDF Size Reducer ships an update every 8 days, and SlangDecoder every 2 months. Most recently, PDF Size Reducer was updated on October 24, 2026 and SlangDecoder on October 24, 2026.

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