PerScaler vs OrthoCam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PerScaler
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Turn your photos into drawing references. PerScaler is a camera app designed to help you prepare photos for drawing and sketching. Crop your images, adjust perspective, and refine the composition to create references that are easier to draw from. Built with simplicity and speed in mind, PerScaler is a photo tool made specifically for artists. Key Features - Import photos from your library - Cropping - Transform (perspective & skew correction) - Composition adjustment Perfect for - Figure drawing references - Gesture drawing (croquis) - Adjusting composition for landscape sketches - Preparing images for illustration PerScaler simplifies your preparation process—so you can focus on drawing.
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
Screenshots
Verdict
The clearest difference is update cadence: OrthoCam at every 2 days against PerScaler's every 11 days. PerScaler's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases 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. PerScaler sells 1 one-off in-app purchase and OrthoCam sells 3 in-app purchases, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.
PerScaler ships an update every 11 days, OrthoCam every 2 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | PerScaler | OrthoCam |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 140 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | 12px, LLC | 意 林 |
In-app purchases
PerScaler
- Buy me a coffee$0.49
OrthoCam
- 年度会员7 Days trial$2.991 Year
- 升级永久$6.99
- 永久会员$9.99








