SnapSize vs Doc Align
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SnapSize
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SnapSize is an app that allows you to measure the length of objects captured by the camera at any time, whenever you need. It enables you to store both the camera images and 3D data together, so if you're unable to measure immediately or if you made a mistake in selecting the measurement point, you can use the app to measure later. The results of your measurements can be saved as images, making it easy to share information or add them to documents. [Main Features] ・Capture and save the data. ・Measure distances anytime by using the saved data. ・Output the results of depth since 3D data is saved. ・Save and share captured data and measurement results. [compatible devices] iPhone 11 Pro iPhone 11 Pro Max iPhone 12 Pro iPhone 12 Pro Max iPhone 13 Pro iPhone 13 Pro Max iPhone 14 Pro iPhone 14 Pro Max iPhone 15 Pro iPhone 15 Pro Max iPhone 16 Pro iPhone 16 Pro Max iPad Pro 11-inch iPad Pro 12.9-inch iPad Pro 13.0-inch
Doc Align
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Key Features - Scan documents, notes, OA boards, blackboards, and photos - Import photos saved on your iPhone - Automatically detect document edges - Auto-correct distortion and straighten images - Extract text from images (OCR) - Share as JPEG or PDF - Share extracted text only What is Doc Align? Doc Align automatically corrects distortions and converts captured or imported images into clean, straight PDFs or JPEGs. It works like a scanner, and with OCR, you can extract text for work, study, or organization. Sharing is simple — send PDFs or images instantly. You can also import photos saved on your iPhone, making it easy to use anytime. Everything is done within the app for smart document management at your fingertips. Useful for - Preparing neat documents for submission - Saving whiteboard notes or board writings - Organizing business cards or receipts into PDFs - Extracting text from images for reuse
Screenshots
Verdict
The clearest difference is in-app purchases: SnapSize at none against Doc Align's 1. SnapSize also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Doc Align's advantage is update cadence (monthly vs every 6 months). On price 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. Doc Align sells 1 one-off in-app purchase. SnapSize asks for nothing beyond the download.
SnapSize ships an update every 6 months, Doc Align monthly. The most recent releases landed on September 11, 2026 and September 2, 2026 respectively.
| Parameter | SnapSize | Doc Align |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 108 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | System Friend, Inc. | Kazuhisa Kobayashi |
In-app purchases
SnapSize
No in-app purchases
Doc Align
- Remove Ads$4.99









