Plain AI vs DOS Focus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plain AI
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Plain AI is a simple, straightforward AI chat app that runs entirely on your device. All conversations are private and processed locally without any internet connection. Key Features • Multiple AI Models: Choose from Llama 3.2 (1B and 3B), Qwen 3.1 1.7B, Gemma 2 2B, or Apple Foundation Models • Complete Privacy: All processing happens on your device - no data is sent to servers • Customizable Parameters: Adjust temperature and top-p settings to control response creativity and diversity • Offline First: Works without internet after initial model download • Clean Interface: Simple, distraction-free chat experience Supported Models • Apple Foundation Models (iOS 26+, no download required) • Llama 3.2 1B (fast and efficient for basic tasks) • Llama 3.2 3B (balanced speed and quality) • Qwen 3.1 1.7B (multilingual support) • Gemma 2 2B (safe and reliable responses) Privacy Your conversations never leave your device. No accounts, no tracking, no data collection. Everything stays private and local. Free Forever Plain AI is completely free with no ads, subscriptions, or in-app purchases. Download a model and start chatting. Requirements • Storage space for downloaded models (approximately 700MB to 2GB per model) • Apple Foundation Models require iOS 26 or later and compatible devices AI responses may occasionally be inaccurate. Please verify important information.
DOS Focus
Enhance concentration with nostalgic computer sounds and a distraction-free environment. Customize focus sessions, track progress, and personalize your interface with classic DOS themes for improved productivity.
- Retro soundscapes
- Customizable focus sessions
- Focus progress reports
- Classic DOS themes
- Offline and minimal design
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Defragment your mind and restore clarity — one retro beep at a time. DOS Focus helps you stay in the zone using nostalgic computer sounds that bring a calm, distraction-free atmosphere. Whether you’re working, studying, or just taking a digital detox, this app turns your focus sessions into a retro experience. Features: • Retro Soundscapes — Immerse yourself in the soothing hum of old-school computers. • Custom Focus Sessions — Choose from quick 15-minute sprints to deep 4-hour marathons. • Focus Report — Track your sessions and see how your concentration improves over time. • Retro Themes — Personalize your screen with classic DOS colors — from Cyan to Magenta. • No distractions — Simple, offline, and minimal. Just focus. Why it works: Retro sounds evoke a sense of calm and simplicity. DOS Focus eliminates digital clutter so your brain can reboot, recharge, and refocus — like defragmenting your hard drive. Whether you’re a developer, writer, student, or anyone craving quiet productivity, DOS Focus brings back the feeling of working on a clean, timeless system — where nothing interrupts your flow. - Reboot your focus. Reclaim your clarity. - Welcome to DOS Focus.
Screenshots
Verdict
The clearest difference is in-app purchases: Plain AI at none against DOS Focus's 2. DOS Focus's advantage is device support (3 vs 1). On price, ads and iOS requirement 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. DOS Focus sells 2 in-app purchases, starting at $17.99 per year. Plain AI asks for nothing beyond the download.
| Parameter | Plain AI | DOS Focus |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 16 MB | 105 MB |
| Age rating | 4+ | 4+ |
| Developer | Jarle Hansen | Nguyen Vu Thai |
In-app purchases
Plain AI
No in-app purchases
DOS Focus
- Try DOS FOCUS PRO$17.991 Year
- Try DOS FOCUS PRO$8.99









