Sphere vs Local Inference OnDevice Agent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sphere
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The multi-model advantage. Every AI model has different strengths. GPT-5 reasons sharply. Claude writes beautifully. Gemini knows the web. Why settle for one? Sphere runs your prompt across up to 4 AI models simultaneously and shows you all the answers in a swipeable carousel, so you can read, compare, and use the best one. MODELS INCLUDED • OpenAI GPT-5.5 & GPT-5.4 Mini • Anthropic Claude Opus 4.8, Sonnet 4.6 & Haiku 4.5 • Google Gemini 3.1 Pro & Gemini Flash 3.5 • xAI Grok 4 • DeepSeek R1 KEY FEATURES • Side-by-side comparison — see up to 4 models answer your question at once • Real-time streaming — answers appear as they're generated • Voice input — dictate your prompts hands-free • Image & file attachments — share screenshots, documents, and more • Thread history — every conversation is saved and searchable SPHERE PRO Unlock all premium models, compare up to 4 at once, and get 500 prompts per month with unlimited threads. Subscriptions are billed through your Apple ID. Cancel anytime in Settings → Apple ID → Subscriptions. Privacy Policy: https://mnemosphere.ai/sphere/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Local Inference OnDevice Agent
This app provides an AI chat experience that runs entirely on your device, ensuring your conversations remain private and offline. It offers various AI models, integrates with device tools, and allows for custom API key usage.
- Runs entirely on-device
- Fully offline functionality
- Zero data collection
- Optional API key integration
- Tools: calculator, web search, webpage reading
- Contacts & calendar integration
- Vision models for photo analysis
- On-device text-to-speech
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Your AI. Your phone. Nobody else's business. LocalInference runs powerful open AI models entirely on your device. Your conversations never leave your phone — no account, no cloud, no analytics, no tracking. Ever. PRIVATE BY ARCHITECTURE, NOT BY PROMISE • Everything runs on-device; works fully offline after a one-time model download • Zero data collection — we couldn't read your chats if we wanted to • API keys (optional) stored in the secure keychain, sent only to the provider you chose A REAL ASSISTANT, NOT JUST A CHATBOT • Tools: calculator, web search, date & time, webpage reading • Contacts & calendar integration — every write action asks you first • Ask about photos with vision models • Reads answers aloud with on-device voices BUILT FOR TINKERERS • 16 curated models from 0.5B to 8B — Qwen3, Llama, Gemma, DeepSeek R1, Phi, SmolVLM • Only models that fit your device's memory are offered • Live tok/s, time-to-first-token, and token counts per response • Thinking models show their reasoning in collapsible blocks • Bring your own keys: Anthropic, OpenAI, Google — or any OpenAI-compatible server (llama.cpp, LM Studio, Ollama) on your own network Built with Llama. Gemma models provided under the Gemma Terms of Use.
Screenshots
Verdict
The clearest difference is in-app purchases: Local Inference OnDevice Agent at none against Sphere's 2. On price, update cadence, ads 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
Both are free to download. Sphere sells 2 in-app purchases, starting at $7.99 per month. Local Inference OnDevice Agent asks for nothing beyond the download.
Sphere ships an update every 3 weeks, Local Inference OnDevice Agent every 2 weeks. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.
| Parameter | Sphere | Local Inference OnDevice Agent |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.4 | 16.4 |
| Further details — not scored | ||
| Size | 57 MB | 52 MB |
| Age rating | 17+ | 17+ |
| Developer | Rajesh Cherukuri | Sameer Shanbhag |
In-app purchases
Sphere
- Premium Monthly$7.991 Month
- Premium Yearly$54.991 Year
Local Inference OnDevice Agent
No in-app purchases
Questions
Is Sphere free?
Is Local Inference OnDevice Agent free?
Do Sphere or Local Inference OnDevice Agent have ads?
Which is updated more often, Sphere or Local Inference OnDevice Agent?
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