QRchive vs Plain AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QRchive
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Our first app! Collect, manage and share all of your QR codes in one place. Great for web developers like us who create a ton of codes to share with different clients. Features: - Collect and search all of your QR codes in one convenient location. - Codes sync across all your devices, stored securely in iCloud. - Capture new codes via camera, share extension, or enter manually. - Annotate with custom labels, for ease of reference. - Share via iOS share sheet, or enable backlight for device-to-device scanning.
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.
Screenshots
Verdict
QRchive and Plain AI are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | QRchive | Plain AI |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Logicbrush Studios, Ltd. | Jarle Hansen |
In-app purchases
QRchive
No in-app purchases
Plain AI
No in-app purchases









