Easy Subtraction vs Stego
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Easy Subtraction
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Easily compare images. Obtain difference images in as few as two taps. Use both captured and library images. Operate offline after installation. How to Use: 1. Tap the camera button to take a mask image. 2. Tap the camera button to take a capture image. 3. Once the images are taken, the app will automatically calculate and display the difference image. 4. If the two images are misaligned, adjust the mask image by moving, rotating, and resizing it while checking the resulting difference image. The resulting difference image will highlight the differences between the two images in white (or black if the image is inverted). You can save the resulting image to your iphone library. if you want to know an answer spot-the-difference puzzles right now, be sure to try this app!
Stego
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Stego lets you hide private text or images inside ordinary photos and extract them later on your iPhone or iPad. Your cover images and hidden payloads are processed on your device—they are not uploaded to Japality Limited. CHOOSE YOUR WORKFLOW • LSB-1 for lossless PNG workflows • DCT and GN-QIM for JPEG and recompressed sharing scenarios • Social Media Mode to prepare images for apps that may resize uploads • Optional error correction for tougher recovery FEATURES • Hide text, notes, or an image inside another image • Extract hidden content from stego images • UTF-8 support, including Chinese and emoji • Warnings when a cover image is too flat for reliable embedding FREE & STEGO PRO Stego is free to use with ads. Stego Pro (monthly or yearly subscription) removes banner, interstitial, and app-open ads. Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the end of the period. Manage subscriptions in Settings → Apple ID → Subscriptions, or in Stego → Settings → Stego Pro. PRIVACY See our Privacy Policy for how ads (Google AdMob) and subscriptions (RevenueCat) handle data. Steganography operations themselves stay on your device. IMPORTANT Stego is for lawful personal use only. You are responsible for complying with applicable laws. Steganography is not encryption—anyone with the original file may detect or lose hidden data if the image is recompressed. Support: https://app.japality.com/stego/i/support/ Privacy: https://app.japality.com/stego/i/privacy_policy/ Terms: https://app.japality.com/stego/i/terms/
Screenshots
Verdict
The clearest difference is in-app purchases: Easy Subtraction at none against Stego's 2. Easy Subtraction also leads on ads (none vs shown). On price, device support 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. Stego sells 2 in-app purchases, starting at $2.99 per month. Easy Subtraction asks for nothing beyond the download.
| Parameter | Easy Subtraction | Stego |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideo Nose | Japality Limited |
In-app purchases
Easy Subtraction
No in-app purchases
Stego
- Stego Pro (Monthly)$2.991 Month
- Stego Pro (Yearly)$14.991 Year









