OpenAssistant vs Banana API
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenAssistant
This app allows users to create and manage custom AI assistants for quick answers about files. It integrates with vector stores for efficient semantic search and supports natural conversations with uploaded documents.
- Create and customize AI assistants
- Manage multiple assistants
- Integrate with vector stores
- Upload and search multiple file types
- Natural language conversations with documents
- Choose ChatGPT models
Read full descriptionHide full description
If you’re seeking quick answers about any file(s) you stumble across, OpenAssistant is here to (help) blow your mind. This app is designed to call the Assistants=v2 API. Core Features: - Create & Customize Assistants: - Personalize names and descriptions - Set custom instructions - Adjust parameters - Choose ChatGPT model (Updated with 4.1 + o1 + o3-mini) - Full Management Control: - Create, update, and delete assistants - Manage multiple assistants for different content - Vector Store Integration: - Create and manage vector stores - Upload and organize multiple file types - Efficient semantic search capabilities Interactive: - Natural Conversations - Chat naturally about your documents - Seamless Integration - Upload multiple files simultaneously - Chat with your files within minutes.
Banana API
This tool simplifies testing AI image generation APIs like Google's Imagen and Nano Banana. It allows users to experiment with prompts and parameters, generate images, and review API calls and responses. The app requires users to provide their own API key and is designed for developers, marketers, and hobbyists.
- Test Google Imagen and Nano Banana APIs
- Generate unlimited images with own API key
- Experiment with prompts and parameters
- Review cURL requests and responses
- Save and share generated AI images
- Easy-to-use interface
Read full descriptionHide full description
A simple yet powerful client for testing Google’s Imagen and Nano Banana APIs. Whether you’re a beginner developer, marketer, or vibe-coder, Banana API makes experimenting with image generation easy and fun. Write a prompt, select aspect ratio and parameters, while Banana API writes the code for you. Submit the API call and review the responses, keep a log of all your API calls and images generated. With Banana API you can: - Enter your own Google Cloud API key to generate unlimited images. - Preview and send API calls instantly with a clean, easy-to-use interface. - Experiment with prompts, aspect ratios, sizes, and generation settings. - View and review your full cURL requests and responses for learning and debugging. - Save or share your generated AI images directly from the app. IMPORTANT INFORMATION This is a client app only. Banana API does not include an API key or access credits. You must provide your own valid Google Cloud API key. Charges may apply. Usage of Google Imagen and Nano Banana through this app will incur costs billed directly by Google Cloud, based on your account and API usage. Stable connection required. A strong and reliable Wi-Fi or mobile data connection is necessary for best performance. No subscription, no hidden fees. Pay once and keep using the app as long as you have your own API key. WHO IS IT FOR? Banana API is designed for: -Developers who want to test APIs quickly from their iPhone. -Marketers and creatives exploring AI-generated images for campaigns. -Students, hobbyists, and low-code makers who want to learn by experimenting. Banana API makes testing AI image APIs approachable, portable, and fun. All while keeping you in control.
Screenshots
Verdict
The clearest difference is price: OpenAssistant at Free against Banana API's $2.99. OpenAssistant also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (16.0 vs 26.0). On ads, in-app purchases and device support 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
OpenAssistant is free to download; Banana API costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OpenAssistant ships an update every 3 weeks, Banana API every 2 months. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.
| Parameter | OpenAssistant | Banana API |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 4 MB |
| Age rating | 17+ | 17+ |
| Developer | Gunnar Hostetler | Claudio Gonzalez |
Customer experience
OpenAssistant
Banana API
In-app purchases
OpenAssistant
No in-app purchases
Banana API
No in-app purchases









