Fraⅹ vs SAI+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fraⅹ
Explore and design intricate fractal art powered by the equations of nature. Zoom into vast digital landscapes, apply complex color gradients and lighting, and share your creations as images or videos. Unleash your inner artist with endless creative possibilities.
- Explore fractal geometry
- Zoom and multi-touch gestures
- Tilt-to-steer navigation
- Complex color gradients
- Dual light sources for reflections
- Share creations via social media
- Record video animations
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** Macworld Editors' Choice Award Winner! ** Smithsonian: “Immersive.” CNET: “Spectacular.” Macworld: “Exquisite.” FRAX Frax is an art program that puts the “equations of nature” in the palm of your hand. Frax is powered by fractal geometry, the same principle that creates patterns of self-similarity in our natural world. From spiral galaxies to hurricanes, from tree limbs to branching blood vessels, the universe is filled with endless variation and staggering beauty. Frax visualizes this natural geometric code, so you can explore vast animating digital landscapes and make a masterpiece on your touchscreen. EXPLORE Zoom deep into your creations. Use multi-touch gestures to fly through and explore intricate shapes and patterns. Tilt-to-steer through animating digital worlds, as you challenge yourself to chart a course for a long and beautiful flight –all at a depth range of a trillion-to-one. DESIGN Unleash your inner artist with complex color gradients to smoothly tint and shade your fractal shapes, two light sources for glossy reflections, and novel textures. The combinations are endless: supersmooth or wildly chaotic, metallic sheen or pearly white, subtle shades, stark monochrome or screaming supergloss. Or upgrade to Pro to access almost 100 parameters and controls! SHARE Then share your creations with your friends via Facebook, Twitter and text. Or invite other users to step into your animating world by sharing a live preset link. You can render high-quality images to your photo library or create ultra-high quality 200 Megapixel renders with an IAP. And for the first time, you can now record VIDEO of your Frax animations directly within the app! (Pro IAP required.) Our users have put their designs on canvas, posters, scarves, T-shirts and textiles. The creative possibilities are endless! What will Frax inspire in you? We hope you enjoy Frax! Ben Weiss • Kai Krause • Tom Beddard
SAI+
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SAI+ is a color management tool that lets you create and share color chip PDFs using only your iPhone or iPad, without a computer. Quickly choose colors on site, organize them into a palette, and export them as a PDF. It is useful for meetings, production instructions, color specifications, design checks, and field work. You can choose colors from photos, the color wheel, sliders, or HEX input. Each selected color can be checked in HEX, RGB, HSB, and CMYK. Add colors as color chips, rearrange them by dragging, and export the list as a PDF. Except for sending or sharing PDFs, the main features do not depend on an internet connection. You can create color chips on an airplane, underground, outdoors, or in places with unstable reception. With AirDrop, you can quickly share them with nearby coworkers or clients. How to use: 1. Choose a color from a photo, color wheel, slider, or HEX input 2. Tap ADD to add it to the color list 3. Add up to 20 colors to one list 4. Drag colors to rearrange the order 5. Export the list as a PDF from the LIST screen 6. Share via AirDrop, email, or messages 7. To rename a saved list, tap the list name Each color list can contain up to 20 colors. You can save up to 50 color lists, with the saved date, time, and a custom name. Exported PDFs can be used for meetings, production instructions, color specifications, and design reviews. HEX, RGB, HSB, and CMYK values are recorded as text inside the PDF, making them easy to check in tools such as Illustrator. SAI+ supports both iPhone and iPad. Use iPhone to choose colors quickly on site, and iPad to review palettes on a larger screen. SAI+ is a one-time purchase app. No subscription. Ideal for design, illustration, UI, print, signage, displays, painting, field production, and any situation where color needs to be communicated accurately. Main features: ・Extract colors from photos ・Color wheel ・RGB / HSB / CMYK sliders ・HEX input ・HEX / RGB / HSB / CMYK display ・Create color lists ・Rearrange colors by dragging ・Up to 20 colors per list ・Save up to 50 lists ・Saved date and time ・Edit color list name ・Export color chips as PDF ・Color values recorded as text in PDF ・Share via AirDrop ・Copy HEX with one tap ・iPhone and iPad support ・Main features work without internet ・No login required ・No subscription SAI+ is not just for choosing colors. It helps you organize colors and hand them off clearly to clients, coworkers, or production teams. Photos stay on your device. Photo access is used only to extract colors from images selected by the user. ※ Colors extracted from photos are approximate values based on image pixels. They may differ from the actual color due to lighting, shadows, reflections, white balance, image correction, or display settings. ※ Even with the same RGB value, colors may appear different depending on the device, brightness, True Tone, Night Shift, and ambient lighting. ※ CMYK values are simplified conversions from RGB. Actual printed colors may vary depending on paper, ink, printer, and color profile.
Screenshots
Verdict
The clearest difference is price: Fraⅹ at Free against SAI+'s $2.99. SAI+'s advantage is in-app purchases (none vs 5). On ads, 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
Fraⅹ is free to download; SAI+ costs $2.99 up front. Fraⅹ sells 5 one-off in-app purchases. SAI+ asks for nothing beyond the download.
| Parameter | Fraⅹ | SAI+ |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.5 (231 ratings) — better | — |
| Positive reviews | 80.7% of reviews | — |
| Number of ratings | 231 — better | — |
| Update frequency | Every 6 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.5 |
| Further details — not scored | ||
| Size | 73 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Iter9, LLC | TAKAO OGASAWARA |
Bugs and requests
Fraⅹ
Reported bugs
3 issues- In-app purchase upgrades not working for some users
- Video recording feature causing app crashes
- Rendering issues on older iPhone models
Requested features
4 requests- Add more fractal types like Burning Ship and Mandelbar
- Implement high-quality video recording and GIF export
- Allow custom audio integration and music visualization
- Improve infinite zoom capabilities
SAI+
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Fraⅹ
- Pack of 20 Cloud Credits$0.99
- Pack of 80 Cloud Credits$2.99
- Frax Pro Upgrade$4.99
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- Pack of 240 Cloud Credits$5.99
- Pack of 1000 Cloud Credits$9.99
SAI+
No in-app purchases









