Comparison

Sphere vs Local Inference OnDevice Agent

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

Head to head
About

Sphere

Features
Read full description

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/

About

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.

Highlights
  • 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
Features
Read full description

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

Sphere4 screens
Local Inference OnDevice Agent3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
Sphere versus Local Inference OnDevice Agent: the parameters behind the verdict, then further details
ParameterSphereLocal Inference OnDevice Agent
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS16.416.4
Further details — not scored
Size57 MB52 MB
Age rating17+17+
DeveloperRajesh CherukuriSameer Shanbhag

In-app purchases

2 purchases

Sphere

Subscriptions2
  • Premium Monthly$7.991 Month
  • Premium Yearly$54.991 Year
None

Local Inference OnDevice Agent

No in-app purchases

Questions

Is Sphere free?
Sphere is free to download, with in-app purchases available.
Is Local Inference OnDevice Agent free?
Local Inference OnDevice Agent is free to download, with no in-app purchases.
Do Sphere or Local Inference OnDevice Agent have ads?
Neither Sphere nor Local Inference OnDevice Agent shows ads.
Which is updated more often, Sphere or Local Inference OnDevice Agent?
Sphere ships an update every 3 weeks, and Local Inference OnDevice Agent every 2 weeks. Most recently, Sphere was updated on October 15, 2026 and Local Inference OnDevice Agent on October 9, 2026.

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