204+ iOS apps curated and reviewed
The best gacc convert challenge apps on iPhone average 4.6★ across 204+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 |
| 2 |  | Free | 4.8★ (11K) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 4.8★ (76K) | Yes | Yes | Jul 2026 |
| 4 |  | Free | 4.9★ (28K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.6★ (16K) | No | Yes | Jul 2026 |
| 6 |  | Free | 4.6★ (13K) | No | Yes | Jul 2026 |
| 7 |  | Free | 4.7★ (5.9K) | No | Yes | Jul 2026 |
| 8 |  | Free | 4.7★ (9K) | No | Yes | Jul 2026 |
Complete virtual fitness challenges and earn real medals. Track your progress by running, walking, or cycling, and sync data from popular fitness apps. Explore challenges based on famous global routes.
This app offers an offline currency converter with up-to-date exchange rates for over 160 currencies. It's ideal for travelers needing to convert money abroad without an internet connection. An optional upgrade removes ads and unlocks all features.
Achieve weight loss and muscle gain with personalized home workout plans and professional guides. This app offers a variety of exercises and customized routines, with an AI trainer to answer your fitness questions. See results in 30 days with zero equipment needed.
Easily transform your photos and documents into a wide range of image formats. Select your input, choose an output, and convert in seconds. Save, share, or open your converted files directly in other applications.
Easily transform audio and video files into various popular audio formats like MP3, WAV, and M4A. Supports dozens of input formats and offers quick, cloud-based or local conversions. Save, share, or listen to your converted files directly from the app.
Effortlessly transform files into various document and image formats like PDF, DOCX, and JPG. Simply select your input, choose the desired output, and convert in seconds. Save, share, or open your converted files directly in other applications.
Easily convert images to over 20 formats like JPG, PNG, PDF, and SVG. This app offers a user-friendly interface for efficient media management, making it simple to prepare photos for professional use or sharing.
Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.
This app is a versatile media converter that handles videos, audio, images, GIFs, and PDFs. It allows for format conversion, audio extraction, video compression, ringtone creation, and even basic video editing. It also includes a built-in media player and file management tools.
Easily transform video and audio files into a wide range of formats like MP4, MOV, and MP3. Select your input, choose an output, and convert in seconds. Save, share, or view your converted files directly from the app.
Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.
Easily convert a wide range of file types, including audio, video, images, documents, and ebooks, to popular formats. This free online tool processes your files in the cloud, saving battery and allowing multitasking.
Enhance your media's audio with this app, offering significant volume and bass boosts for music, videos, and audio files. It also functions as a versatile media converter, supporting numerous formats and allowing for video enhancements like subtitle embedding.
Effortlessly calculate foreign exchange with real-time rates for over 160 currencies. Download rates for offline use, view historical charts, and perform quick calculations across multiple currencies.
This app helps you complete self-improvement challenges with customizable tasks, progress tracking, and motivational tools. Log daily activities, capture progress photos, and generate timelapse videos. All your data is stored securely on your device.
Easily transform documents and images into professional PDF files. This tool supports numerous formats and offers features like merging, splitting, and compressing PDFs, all within a simple interface.
This app offers a smart calculator with a history tape and expression view to track your calculations. It includes over 500 unit conversions and scientific functions, with an Apple Watch extension for on-the-go use.
Easily convert currencies from around the world with this reliable reference application. Calculate amounts across multiple currencies, view conversion history, and even convert offline. Ideal for travelers and international shoppers.
Easily convert ebooks between numerous formats like EPUB, MOBI, and PDF. Simply select your file, choose an output format, and convert in seconds. Save, share, or open converted files in your preferred reader apps.