Comparison

ImageConverter vs Poly

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

Head to head
About

ImageConverter

Easily resize and change the file format of your images. Supports batch conversions for up to 15 images at once, with options to specify size by percentage or pixels while retaining aspect ratio. Save in HEIC, PNG, or JPG formats.

Highlights
  • Resize images by percentage or pixels
  • Convert between HEIC, PNG, and JPG
  • Batch conversion up to 15 images
  • Maintain aspect ratio
  • Simple 4-step conversion process
Features
Read full description

You can convert the image size and storage format with a simple operation! Of course, multiple simultaneous conversions are also supported! ・ The size can be specified by% and pixel, and the retention / non-retention of aspect ratio can be changed. ・ Supported saving formats are HEIC, PNG, and JPG. ・ Up to 15 images can be converted simultaneously. ■ Usage You can convert images in 4 simple steps ● Step 1 Tap the part where "NO IMAGE" is displayed and select the image you want to convert ● Step 2 Adjust the Width and Height values and select "%" or "pixel" to determine the size ● Step 3 Choose HEIC, PNG or JPG and decide the save format ● Step 4 Tap the save button at the bottom right of the screen to save

About

Poly

Features
Read full description

Poly-PDF — Scanner, PDF Editor & Annotator Pay once, own it forever — no subscriptions, no in-app purchases, no surprises. Poly-PDF is a complete PDF editor for iPhone and iPad. Edit text directly on the page, annotate documents, fill forms, sign, and organize your files. EDIT TEXT IN PLACE Tap any text on a PDF and start typing. PolyPDF lets you edit the actual content of a document right on the page, preserving the original font, size, and layout. Change a date, fix a typo, or rewrite a paragraph. ANNOTATE ANYTHING Add sticky notes, text boxes, shapes, arrows, and freehand ink drawings anywhere on a page. Highlight, underline, or strikethrough selected text. Every annotation is saved directly into the PDF so it opens correctly in any other app. FILL FORMS & SIGN Tap any form field to fill it in. Add your signature from a saved library or draw a new one. Insert images and stamps with a single tap. SHAPES & DRAWING Draw rectangles, ovals, lines, and arrows with full control over stroke color, fill color, and line width. Sketch freely with the pen tool or highlight with the highlighter. Smart alignment guides help you center and align objects on the page. ORGANIZE YOUR LIBRARY Keep your PDFs tidy with folders, search, and sort options. Drag a file onto a folder to move it instantly. Open PDFs directly from iCloud Drive and save changes back in place. SCAN DOCUMENTS Turn paper into PDFs with the built-in document scanner. Scan multi-page documents in seconds and save them straight to your library. POWERFUL PAGE TOOLS Reorder, rotate, insert, and delete pages. Export a clean flattened copy of any document. Redact sensitive information permanently with the redaction tool. BUILT FOR iPAD Open two documents side by side in split view with synchronized scrolling. Use the full-screen reading mode for distraction-free viewing. Keyboard shortcuts make editing faster than ever. MORE FEATURES · Table of contents navigation · Bookmarks and go-to-page · Full-text search across pages · Password-protected PDF support · Dark mode support · Undo and redo for all edits · Works entirely offline — no account required Poly-PDF is built for people who work with documents every day. Whether you're reviewing contracts, editing reports, filling out forms, or marking up study notes, Poly-PDF gives you the tools to get it done — right on your device.

Screenshots

ImageConverter3 screens
Poly4 screens

Verdict

The call

The clearest difference is price: ImageConverter at Free against Poly's $2.99. ImageConverter also leads on iOS requirement (11.0 vs 17.0). On update cadence, ads, in-app purchases and device support 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

ImageConverter is free to download; Poly costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ImageConverter ships an update every 3 weeks, Poly every 2 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 7 level
ImageConverter versus Poly: the parameters behind the verdict, then further details
ParameterImageConverterPoly
PriceFree — better$2.99
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size12 MB19 MB
Age rating4+4+
DeveloperKenta TanakaGerman Alfonso Torres

In-app purchases

None

ImageConverter

No in-app purchases

None

Poly

No in-app purchases

Questions

Is ImageConverter free?
ImageConverter is free to download, with no in-app purchases.
Is Poly free?
Poly costs $2.99, with no in-app purchases.
Do ImageConverter or Poly have ads?
Neither ImageConverter nor Poly shows ads.
Which is updated more often, ImageConverter or Poly?
ImageConverter ships an update every 3 weeks, and Poly every 2 weeks. Most recently, ImageConverter was updated on October 3, 2026 and Poly on October 5, 2026.

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