Comparison

PowerRGB vs Models Zoo

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

Head to head
About

PowerRGB

Easily create custom RGB colors and gradients directly on your iPhone. Adjust Red, Green, and Blue sliders to achieve limitless color possibilities.

Highlights
  • Create RGB colors
  • Red, Green, Blue sliders
  • Gradient creation
  • Multiple color gradients
  • iPhone native
Features
Read full description

With PowerRGB, you're able to create RGB colors, right from your iPhone. With the ability to create colors with Red, Green, and Blue sliders and gradients with multiple colors, the possibilities are limitless.

About

Models Zoo

Explore and experiment with various AI models directly on your device. This app allows you to chat with language models, generate images, process audio and video, and inspect model performance without needing a server or account. It's designed for developers to easily integrate AI into their own applications.

Highlights
  • On-device AI model catalog
  • Chat with language and vision models
  • Image generation and manipulation
  • Audio processing and speech synthesis
  • Model inspection and benchmarking
  • Swift code export for integration
  • Privacy-focused local inference
Features
Read full description

Core ML Models is a curated, on-device AI playground. Download any model from the built-in catalog and try it out instantly — no server, no account, nothing leaves your device. Every model is an open-source release converted from PyTorch to Apple's Core ML format and tuned to run efficiently on the Neural Engine, GPU, or CPU. WHAT YOU CAN DO • Chat with small language models (Gemma, etc.) including multimodal vision+text • Generate images from text with Hyper-SD • Remove backgrounds, matte video subjects, and colorize old photos • Estimate depth and reconstruct 3D faces from a single photo • Detect and classify with YOLO, SigLIP, and zero-shot open-vocabulary models • Separate music stems with Demucs and transcribe audio to MIDI with Basic Pitch • Clone voices and synthesize speech with Kokoro and OpenVoice • Super-resolve images with SinSR and RealESRGAN. DEVELOPER TOOLS, NOT JUST A DEMO • Inspect — see every .mlpackage's input/output tensor shapes, data types, compute-unit setting, on-disk size, and Core ML metadata at a glance. • Benchmark — run warmup + timed iterations on your own device and get average / median / min / max latency plus memory delta. Switch compute units (All, CPU+GPU, CPU+ANE, CPU only) to find the fastest config for your hardware. • Swift Code — export a ready-to-paste Core ML loading + inference snippet wired to the model's actual input/output names, so integration into your own app is copy-paste fast. DESIGNED FOR THE NEURAL ENGINE Each model ships with compute-unit settings tuned per-architecture (Neural Engine, GPU, CPU) so you get the best inference speed Apple Silicon can deliver. OPEN AND TRANSPARENT Every model in the catalog links back to its original paper, repository, and license. Conversion scripts are public on GitHub so you can see exactly how the .mlpackage files were produced. PRIVACY FIRST All inference runs locally on your device. The app only fetches model files from public storage over HTTPS — there are no analytics, no ads, and no account to create. REQUIREMENTS • iPhone or iPad with Apple Silicon recommended for best performance • Some large models require several GB of free storage and ≥ 6 GB RAM

Screenshots

PowerRGB4 screens
Models Zoo4 screens

Verdict

The call

The clearest difference is rating: PowerRGB at 5.0 against Models Zoo's 3.0. PowerRGB also leads on device support (4 vs 2) and iOS requirement (14.3 vs 18.0). Models Zoo's advantage is update cadence (weekly vs every 6 weeks). On price, ratings volume, ads and in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PowerRGB holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

UpkeepUpdate frequency

PowerRGB ships an update every 6 weeks, Models Zoo weekly. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 6 level
PowerRGB versus Models Zoo: the parameters behind the verdict, then further details
ParameterPowerRGBModels Zoo
PriceFreeFree
Rating5.0 (5 ratings) — better3.0 (2 ratings)
Positive reviews66.7% of reviews—
Number of ratings5 — better2
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS14.3 — better18.0
Further details — not scored
Size1 MB13 MB
Age rating4+4+
DeveloperGryzle LLCDaisuke Majima

Customer experience

PowerRGB

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Models Zoo

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

PowerRGB

No in-app purchases

None

Models Zoo

No in-app purchases

Questions

Is PowerRGB free?
PowerRGB is free to download, with no in-app purchases.
Is Models Zoo free?
Models Zoo is free to download, with no in-app purchases.
Which has better reviews, PowerRGB or Models Zoo?
PowerRGB is rated higher. PowerRGB averages 5.0 out of 5 from 5 ratings, while Models Zoo averages 3.0 from 2 ratings.
Do PowerRGB or Models Zoo have ads?
Neither PowerRGB nor Models Zoo shows ads.
Which is updated more often, PowerRGB or Models Zoo?
PowerRGB ships an update every 6 weeks, and Models Zoo weekly. Most recently, PowerRGB was updated on November 3, 2026 and Models Zoo on November 9, 2026.

Other comparisons