PicDiff vs Xprompt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PicDiff
Compare photos with precision by overlaying two images. Analyze subtle differences down to the pixel with an intuitive and user-friendly interface, perfect for professionals and enthusiasts alike.
- Overlay comparisons
- Pixel-level precision
- User-friendly interface
- In-depth photo analysis
- Subtle variation detection
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Introducing PicDiff: Your Go-To iOS App for In-depth Photo Comparisons! With PicDiff, delve deep into the essence of your images by overlaying two photos for a thorough comparison. Whether you're a professional photographer, a designer looking for subtle variations, or just curious about the changes between two moments captured, PicDiff is designed just for you. Key Features: - Overlay Comparisons: Effortlessly layer two images for an in-depth juxtaposition. - Pixel-level Precision: Analyze differences with unmatched accuracy down to the pixel. - User-friendly Experience: Navigating and comparing has never been more straightforward with our intuitive design. Dive into the world of detailed photo analysis. Experience the unmatched capability of PicDiff now! [Privacy Policy] https://aceca.co.jp/privacy/privacy-photocomp.html [Terms of Use] https://aceca.co.jp/terms/terms-photocomp.html This application includes Apache License, Version 2.0 work. Icons by Icons8 https://icons8.com/ Note : Please use this application at your own risk. We can not be held liable or responsible for any damages caused by using this application.
Xprompt
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Xprompt is a lab for Apple's Foundation Models. Write a prompt, tune it, and see exactly how the model responds, before it ever ships in your app. TWO MODELS, ONE PLACE Run prompts on the on-device model, or on Apple's server model through Private Cloud Compute, with a larger context window and deeper reasoning. Switch per chat, any time. COMPARE SIDE BY SIDE Split any chat in two and send every prompt to both. Try different models, temperatures, sampling or reasoning levels, with timing and token counts under each answer. SEE WHAT THE MODEL SEES • Exact input, output and reasoning token counts • A live meter that shows how full the context window is • The model's reasoning, streamed as it thinks • Clear errors when a prompt is refused, rate limited or runs out of context ITERATE FAST • Edit any message and resend it, or branch a conversation into a new chat • Change the instructions mid-chat; the next reply uses them • Attach images and ask about them • Temperature, sampling and reasoning controls • Markdown with code blocks and tables BUILT FOR iPAD AND MAC A native sidebar, keyboard shortcuts, Dynamic Type and VoiceOver throughout. Available in English, Portuguese, Spanish, Italian and Chinese. No accounts and no API keys. On-device chats never leave your device, and Private Cloud Compute is Apple's privacy-first cloud. Requires Apple Intelligence. Image prompts, reasoning and Private Cloud Compute need iPadOS 27 or macOS 27. Private Cloud Compute has a daily usage limit set by Apple. PART OF CAIO'S CREATIVE STUDIO Xshirt, Xprompt and Xspeak are three apps for iPad and Mac by Caio Agra Lemos, made for the ideas you put out.
Screenshots
Verdict
The clearest difference is price: PicDiff at Free against Xprompt's $0.99. PicDiff also leads on update cadence (monthly vs every 4 months) and iOS requirement (12.0 vs 26.0). Xprompt's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
PicDiff is free to download; Xprompt costs $0.99 up front. PicDiff sells 1 one-off in-app purchase. Xprompt asks for nothing beyond the download.
PicDiff ships an update monthly, Xprompt every 4 months. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.
| Parameter | PicDiff | Xprompt |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Monthly — better | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPad, Mac |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 23 MB | 9 MB |
| Age rating | 4+ | 12+ |
| Developer | Aceca Corp. | Caio Agra Lemos |
In-app purchases
PicDiff
- Upgrade$17.99
Xprompt
No in-app purchases









