OrthoCam vs Hidden Layer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OrthoCam
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OrthoCam is a perspective-correction camera built for architecture and spatial photography. Shooting skyscrapers, interiors, bridges, and skylines, the last thing you want is slanted lines and perspective distortion. OrthoCam uses your device's motion sensors to align horizons and verticals in real time and automatically corrects wide-angle distortion — no post-processing needed. Level and straight, every shot. 【Key Features】 • Perspective Correction: Motion-sensing auto-aligns horizontal and vertical lines and fixes wide-angle distortion, so your shots come out level and straight. • Apple Log Workflow: Shoot in Apple Log to preserve maximum dynamic range and enjoy freer color grading in post. • 35 Pro-Grade LUTs: Built-in presets deliver professional looks straight out of camera; import your own LUTs too. • Multiple Aspect Ratios: Switch between common ratios freely for more flexible composition. • Pro Exposure: 13/24/50/100mm focal-length steps, independent exposure and spot metering for accurate results even in low light. • Grid Guides: Rule-of-thirds and golden-ratio overlays keep your composition on point. • Photos + Video: Correct perspective in stills; apply real-time LUT grading to video and export clips as Live Photos. • Fully On-Device: All processing happens locally — nothing is uploaded or collected, and your privacy never leaves the phone. From city skylines and historic eaves to interior spaces — level and straight, every shot. 【Pricing & Subscription】 Download free, with a full-featured 3-day free trial on first launch! Two subscription options to choose from: • Annual Membership (includes a 7-day free trial) Payment will be charged to your Apple Account upon confirmation. Subscriptions auto-renew; to cancel, turn off auto-renewal in your Apple Account's Subscriptions at least 24 hours before the current period ends. • Lifetime Membership — one-time purchase Unlock everything forever with a single purchase — no auto-renewal. Annual members can upgrade to Lifetime by paying the difference. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://orthocam.flytopi.com/privacy.html
Hidden Layer
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The photos we take often hide a dozen or so layers! Let's go see what's inside. This app lets you view every layer in a photo, and it also has a few useful or fun photo tools! View Layers Pick a photo and you'll see all kinds of layers inside it — maybe a depth map, a glasses mask, and more. Every layer comes with a detailed explanation. You'll discover a lot! For example, I found out that with ProRAW, what I usually see in my photo library is just the JPG preview layer inside… Of course, you can export layers too. For example, export the Low-Processing Rendering of a ProRAW main photo — a special rendering you've probably never seen. It's closer to the raw data and great for editing! You can also export the depth map and use it in Photoshop for more accurate background blur. Photo Tools Oh, and using these hidden layers, we can also process photos. For example, add a depth map to a regular photo and it becomes a Portrait mode photo, so you can refocus and add background blur right in the Photos app! There's also Remove Sharpening and Natural Key Photo — really useful if you prefer less sharpening, or want your Live Photo key photo to keep its colors. This is just the beginning. If you have a good idea, let me know!
Screenshots
Verdict
The clearest difference is price: OrthoCam at Free against Hidden Layer's $0.99. Hidden Layer's advantage is in-app purchases (none vs 3). On ads, 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
OrthoCam is free to download; Hidden Layer costs $0.99 up front. OrthoCam sells 3 in-app purchases, starting at $2.99 per year. Hidden Layer asks for nothing beyond the download.
| Parameter | OrthoCam | Hidden Layer |
|---|---|---|
| Price | Free — better | $0.99 |
| Update frequency | Daily | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 35 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | 意 林 | 北北 宋 |
In-app purchases
OrthoCam
- 年度会员7 Days trial$2.991 Year
- 升级永久$6.99
- 永久会员$9.99
Hidden Layer
No in-app purchases





