ThinkByte vs Private Mind
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThinkByte
This AI assistant operates entirely on your device, offering private and fast responses without internet access. It's ideal for brainstorming, learning, and getting writing support, ensuring your data remains secure and local.
- Fully offline AI operation
- Private and secure on-device data
- Instant AI responses
- Choice of local AI models
- Writing and learning support
- No accounts or tracking
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ThinkByte is an AI assistant that runs on your iPhone instead of in the cloud. Ask it a question, talk to it, or show it a photo, and it answers right on the device. Nothing connects to a server, so it works the same on a flight, on the subway, or anywhere with no signal. Your conversations stay on your phone and are never uploaded. Type or talk. Use the keyboard, or hold the mic and speak. ThinkByte takes voice and images, not just text. Choose your model. Download a small, fast model or a larger one for tougher questions, right from the app. More get added over time. Private by default. No account. No sign-up. Your chats never leave your phone. Anonymous diagnostics are optional and you can turn them off in Settings. Built for real life: Flights and travel Subways, basements, and dead zones Limited or expensive data plans Anyone who would rather keep their conversations off other people's servers Download ThinkByte and start chatting, fully offline.
Private Mind
This AI chatbot operates entirely offline, offering a private and secure space for writing assistance, idea generation, or conversation. Customize AI assistants and test local language models without needing an internet connection.
- Offline AI chatbot
- Private and secure conversations
- Customizable AI assistants
- Local language model testing
- No internet required
- No sign-ups or subscriptions
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Run open AI models like Llama, Gemma, and Qwen on your phone. Offline. Private. Free. No account, no tracking, no subscription. Powered by React Native ExecuTorch. Meet Private Mind, the AI assistant that never phones home. Every conversation runs entirely on your device, so it works in airplane mode, on a plane, or anywhere the internet can't reach. Why Private Mind? · 100% offline: no internet needed, chat anywhere · Total privacy: zero telemetry, your words never leave the phone · Chat with your documents: import PDF or TXT files and get answers with clickable citations, so you can verify every source · Model Hub: curated open models grouped by family, or import your own · Built-in benchmarks: see how fast each model runs on your hardware before you commit · Local speech-to-text: dictate prompts with Whisper, transcribed on-device · Make it yours: custom system prompts, chat search, conversation forking and export Models download once (about 1 to 3 GB each, best over Wi-Fi) and stay on your device. A modern phone with 4 GB+ RAM is recommended for larger models. Not sure? Run the built-in benchmark. Free and open source. Verify the code yourself: github.com/software-mansion-labs/private-mind Built by Software Mansion, core React Native contributors, on React Native ExecuTorch.
Screenshots
Verdict
The clearest difference is review sentiment: ThinkByte at 50% against Private Mind's 0%. ThinkByte also leads on rating (4.1 vs 2.3) and ratings volume (11 vs 3). Private Mind's advantage is in-app purchases (none vs 1). 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. ThinkByte sells 1 one-off in-app purchase. Private Mind asks for nothing beyond the download.
ThinkByte holds the better App Store score, 4.1 against 2.3. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews point the same way: 50% of ThinkByte's written reviews are positive against 0% of Private Mind's.
ThinkByte ships an update fortnightly, Private Mind every 2 weeks. The most recent releases landed on September 13, 2026 and September 24, 2026 respectively.
| Parameter | ThinkByte | Private Mind |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (11 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 11 — better | 3 |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 64 MB | 95 MB |
| Age rating | 4+ | 4+ |
| Developer | ByteInk L.L.C-FZ | SOFTWARE MANSION SP Z O O SPOLKA KOMANDYTOWA |
Customer experience
ThinkByte
Private Mind
In-app purchases
ThinkByte
- Lifetime Premium$9.99
Private Mind
No in-app purchases








