COMPARE FRACTAL APPS · SEPTEMBER 2026
All on the device in your hand. Mandelbrot Metal 3 brings fast, deep Mandelbrot exploration and high-resolution art creation together on iPhone and iPad. Its hallmark is the combination: Metal-powered performance, precise deep-zoom navigation, and on-device Pro exports at 8K and beyond. Explore, refine, and render your finished image without a desktop or cloud-rendering service.
Version 3 is here. Compare Mandelbrot Metal 3 with seven iPhone and iPad alternatives. Performance evidence below identifies the measured build and test conditions.
*Published MM 3 build 548 test on iPhone 17 Pro Max, iOS 26.6.1, at 1320 × 2868 pixels: 203.890 s → 42.419 s for the ten-scene total, averaged over forward/reverse passes. These are complete scene-render timings through presentation submission. The 4.81× result compares that build and corpus with the previous release; it is not a competitor speed ranking or an 8K export benchmark. See the method and results, pp. 28–30.
The Infinity Engine brings demanding Mandelbrot work to the Metal GPU, backed by high-precision reference calculations. Pan and pinch with immediate visual feedback while the exact scene refines from the center outward. Complete-image capture then renders your chosen output on the same iPhone or iPad.
Explore Mandelbrot and Julia sets with all 156 built-in palettes, including 55 Ultra-Wide ramps. The Infinity Engine and full rendering precision are included in Free, along with 56 curated starter bookmarks, five personal bookmark slots, and canvas-size PNG capture.
The Infinity Engine supports a validated 10²⁵ Mandelbrot scale ceiling. Compensated navigation preserves tiny movements, detail refines from the center outward, and Back/Forward restores up to 50 complete session states.
Pro adds photo-derived and custom palettes, 3D Look lighting, unlimited bookmarks, and 4K, 6K, 8K or larger custom PNGs rendered on your device. Choose your own output dimensions beyond 8K, within available memory and practical render time.
The 10²⁵ boundary is the app’s navigation scale in points per complex-plane unit, not a guaranteed magnification ratio against another app. It applies to Mandelbrot; Julia uses its direct renderer. Useful detail and render time vary with the scene, iterations, sampling and device. Read how the engine works.
All eight apps support iPhone and iPad. Start with Handheld performance, then compare numerical depth and finished-image resolution. The performance column distinguishes published timings from documented rendering approaches and developer claims.
MM 3 and 7 alternatives. Scroll the table sideways to read every category.
| App & focus | Handheld performance | Depth & rendering | Color & palettes | Lighting & motion | Image export | Save & revisit | Free & paid access |
|---|---|---|---|---|---|---|---|
| Mandelbrot Metal 33.0 Fast deep-zoom exploration and high-resolution art, rendered on your iPhone or iPad. Sources | Measured on iPhone: 4.81× aggregate speedup over the previous release in the published ten-scene test. Metal GPU deep rendering with immediate gesture previews and complete on-device capture. Test details and scope. | Infinity Engine: Metal perturbation with CPU double-double references and recovery. Validated Mandelbrot scale ceiling: 10²⁵; Julia uses its direct renderer. | 156 built-in palettes in Free, including 55 Ultra-Wide. Pro adds custom palettes and photo-derived gradients. | Pro: adjustable 3D Look surface lighting. No built-in video export or tilt steering in v3.0. | On-device PNG: canvas size in Free; 4K, 6K, 8K and custom dimensions beyond 8K in Pro, subject to device memory and render time. Capture waits for completion. | Back/Forward through 50 session states. Portable bookmarks preserve deep coordinates and scene settings; custom palette files travel separately. | V3 Free: full engine, all built-in palettes, 56 starters plus 5 personal bookmarks, and canvas PNG. Pro: expanded creative tools and output. Verified pre-v3 owners keep Pro permanently. |
| Frax2.1.0 Immersive fractal art, animation and tilt steering. Sources | Designed for real-time animated exploration with touch and tilt navigation. Pro supports on-device image rendering; optional 200-megapixel renders use its cloud service. | Advertises a trillion-to-one depth range. The listing does not specify a Metal or numerical-precision implementation. | Editable color gradients; Pro expands the available parameters and controls. Photo-to-palette import is not documented in the reviewed sources. | Two lights, textures and tilt steering. Pro includes animation video recording. | Pro: up to 8192 × 8192 on-device, per the developer’s App Store response. Also offers 200-megapixel cloud renders via in-app purchases. | Shares live preset links so another user can reopen a scene. | Free download, paid Pro upgrade and separately purchased cloud-render credits. |
| FractalEcho1.0.68 Extreme-depth exploration, multiple fractals and educational measurements. Sources | The developer describes real-time algorithms and faster deep exploration. Reviewed sources provide no timed renders tied to a specific device, scene, and output size. | Advertises resolution to 10⁻¹¹⁰⁰ and up to 1 billion iterations. These are developer claims, not comparable speed measurements. Metal is not specified. | Dynamic palettes, animated colors and color-rate controls. Photo-to-palette import is not documented in the reviewed sources. | Animated colors documented; relief lighting and tilt steering are not specified. | High-resolution graphics and fractal-data export documented; explicit 4K/8K dimensions are not given. | Bookmarks, personal notes, fractal-data sharing and a community gallery. | Free download with Pro in-app purchases; some features require payment. |
| Fractal Travel1.12.0 25 patterns, including Mandelbrot, Julia and Burning Ship. Sources | Metal-powered real-time exploration with pinch, pan, and automatic zoom. The reviewed listing gives no timed deep-scene or 4K-export results. | Metal rendering. Free zoom is limited to 2,000×; Premium adds deeper zoom without a stated maximum. | Free: 3 color presets. Premium: all palettes, custom colors and additional render styles. Photo import is not documented. | Auto zoom plus Premium GIF/video export. Surface lighting and tilt steering are not specified. | Free: low-resolution, watermarked images. Premium: watermark-free 4K images and wallpaper sizing. | Recent explorations and last-scene restoration. Portable scene-file sharing is not specified. | Free: 2 base patterns plus a daily free fractal. Premium unlocks all patterns, deeper zoom and expanded output. |
| Fractally1.0.1 Mandelbrot + Julia, point-orbit visualization and education. Sources | Multi-core CPU vector rendering with adaptive image quality during zoom. Publishes device-specific iterations-per-second results; these measure throughput rather than complete scene-render time. | Over 10¹²× zoom and 2,000+ iterations advertised. Developer documents CPU vector processing with adaptive 32/64-bit arithmetic. | Multiple color schemes. Photo-derived palettes and a custom-palette editor are not specified. | Interactive point-orbit visualization. Relief lighting and tilt steering are not specified. | Anti-aliased PNGs; maximum image size depends on device memory. No fixed 4K/8K ceiling is stated. | Saved favorites and portable .fractally coordinate files. | All features free on iPhone, iPad and Mac; optional donations. |
| Mandel Draw2.1.10 Up to 80 functions, with Mandelbrot and filled Julia sets. Sources | Offers two rendering methods and describes fast touch interaction. The reviewed listing provides no device-specific scene-render or high-resolution export timings. | DF64 arithmetic option for deeper zoom, with documented exclusions. No numeric maximum zoom or Metal claim in the listing. | 20+ palettes and a custom My Palette editor; paid unlock allows up to 30 custom palettes. Photo import is not specified. | Surface lighting, tilt steering and video export are not specified. | High-resolution sharing at 4× the view’s width and height. Fixed 4K/8K presets are not specified. | Favorites and My Palette sync through iCloud. Paid unlock allows up to 2,000 favorites; sharing can include detailed information. | Free download; an in-app purchase unlocks all functions and palettes plus larger saved libraries. |
| Fast Fractal1.0.4 A compact Mandelbrot + Julia explorer. Sources | Multicore, double-precision rendering with fluid pinch-and-swipe exploration claims. The reviewed listing provides no timed scene-render or high-resolution export benchmark. | Advertises 10¹¹× magnification with double-precision arithmetic and multicore support. Version history describes OpenGL rendering. | Palette and photo-import capabilities are not specified in the listing. | Pinch/swipe exploration; surface lighting, tilt steering and video export are not specified. | Dedicated high-resolution export is not specified in the listing. | Manual coordinates and iteration controls; portable bookmarks are not specified. | Free. |
| Jude — Fractal Explorer2.0.9 Simple Mandelbrot + Julia exploration and device backgrounds. Sources | Interactive Mandelbrot and Julia exploration. The reviewed listing gives no rendering architecture or timed performance measurements. | Zooming is advertised without a numeric limit or precision specification. “Infinite” wording is not a measured depth. | Color adjustment documented. A custom/photo-palette workflow is not specified. | Surface lighting, tilt steering and video export are not specified. | Saves device backgrounds; export dimensions are not specified. | A coordinates picker is documented in version history; portable scene files are not specified. | Free. |
Feature descriptions were reviewed on September 17, 2026; performance descriptions and US App Store release versions were checked on September 21, 2026. Published by Mandelbrot Metal using the linked developer sources. A fair speed ranking would require the same device, scene, depth, iterations, output size, and image quality; we have not run that cross-app test. Depth figures use different definitions, and an undocumented feature is not proof that it is unavailable.
MM 3 combines the Infinity Engine’s deep-rendering speed with precise navigation and high-resolution on-device capture. Find a scene, explore its detail, shape its colors and lighting, then produce your finished PNG on your iPhone or iPad. The full engine is included in Free; Pro opens 4K, 6K, 8K, and larger custom output.
Every built-in palette and the full mathematical engine are included in MM 3 Free. Pro adds your own photo colors, surface lighting, unlimited bookmarks and on-device exports beyond the 8K preset. You can start with the complete exploration engine and expand your creative tools when you want them.
Other apps have distinct specialties: Frax offers animation and tilt steering; FractalEcho advertises exceptional numerical depth; Fractal Travel and Mandel Draw span more formulas; Fractally makes all its features free. MM 3 brings a focused combination of deep Mandelbrot performance, precise control and a substantial still-art toolkit. The table above shows the differences without reducing them to a point score.
Links below support the product descriptions above. “Not specified” means the reviewed documentation does not establish that capability. Paid tiers and availability can change; confirm purchase terms in the app.