# Castform — HEIC Converter. On-Device.

> HEIC Converter. On-Device. (iPhone/iPad app by ADIN HALILOVIC.)

- Source: https://appshunter.io/ios/app/castform/id6770238412 (this page in markdown: same URL + `.md`)
- Developer: [ADIN HALILOVIC](https://appshunter.io/developer/1718928409)
- Category: Utilities, Photo & Video
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 8 MB
- Released: 2026-05-19
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/castform/id6770238412/reviews.md

## What is Castform?

Castform is the fastest way to convert HEIC and HEIF images from your iPhone camera into any format you need — without ever leaving your device.

No cloud uploads. No subscriptions. No compromises. Everything happens on-device using native Apple frameworks, so your photos stay completely private.

CONVERT TO ANY FORMAT
Pick from 7 output formats:
- JPEG — universally compatible, great for sharing
- PNG — lossless quality, perfect for graphics
- WebP — modern format, smaller file sizes
- PDF — single or batch images as a document
- TIFF — professional, uncompressed quality
- BMP — classic bitmap for legacy compatibility
- GIF — animated-friendly format

BUILT FOR SPEED
Castform is a single-purpose tool designed to do one thing exceptionally well. Select your output format, tap the upload zone, pick your photos, and you're done. Batch-convert up to 20 images in a single session.

COMPLETELY ON-DEVICE
Your photos never leave your iPhone. Castform uses Apple's ImageIO, CoreImage, and PDFKit frameworks exclusively — no third-party image processing, no server requests, no account required.

SHARE SHEET INTEGRATION
Convert directly from the Photos or Files app. Tap Share on any image, choose Castform, pick your format, and the converted file is ready to save — without ever opening the app.

CONVERSION HISTORY
Castform keeps your last 10 conversions in a history list. Tap any item to re-export it again in the same format whenever you need — no need to reconvert.

CLEAN & FOCUSED DESIGN
A minimal, distraction-free interface designed around your workflow. No unnecessary features, no ads, no noise.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |



## Version history (last 5 releases)

### 1.2.1 — 2026-07-27

Fixed the issue where the user gets shown a black box instead of the ad itself.
Minor performance improvements.

### 1.2.0 — 2026-07-16

We've added support to keep Castform free while introducing occasional ads. We've also made under-the-hood improvements to app performance and privacy handling.

### 1.1.1 — 2026-06-11

Fixed an issue where portrait photos would appear rotated after conversion. Images now export in the correct orientation across all supported formats.

### 1.1.0 — 2026-05-23

The history remains in-tact after restarting the application.

### 1.0 — 2026-05-19

No release notes.

## More apps by ADIN HALILOVIC

- [ModelioAR](https://appshunter.io/ios/app/modelioar/id6473444593)
- [Uzip](https://appshunter.io/ios/app/uzip/id6767870303)
- [Stackboard](https://appshunter.io/ios/app/stackboard/id6771120791)

All apps by ADIN HALILOVIC: https://appshunter.io/developer/1718928409

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-28.*