Calibration Plus vs Pic Warp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calibration Plus
This app aids in creating digital negatives for alternate process printing, offering fine tone control. It helps achieve better prints with improved dark, white, and halftone tones by designing correction curves. Generate reference charts and use image processing software to refine your digital negatives for perfect prints.
- Fine tone control for digital negatives
- Correction curve design
- Reference chart generation
- Alternate process printing aid
- Improved print quality
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Calibration+ helps you for alternate process printing, by allowing fine tone control on your digital negatives. For instance, the cyanotype process is contrasted with poor half tones. Calibration+ helps you to have better prints with dark, white and halftones by designing a correction curve. With Calibration+, generate a reference chart on your device. Use your favorite image processing software :Adobe Photoshop™, Gimp, Affinity Photo™, Lightroom™… to generate digital negative. Invert. Flip. Print (as usual). Photograph the print! Calibration+ computes the adjustment curve in your photo software to have perfect prints.
Pic Warp
Easily correct perspective distortion in photos. Transform skewed images into perfect rectangles or place new images into existing skewed areas, like billboards or posters. Achieve precise results with intuitive controls.
- Perspective skew and unskew
- Convert skewed areas to rectangles
- Insert photos into skewed areas
- Manual aspect ratio adjustment
- Control point selection
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[Pic Warp] is a powerful photo geomtry editor which supports perspective skew and unskew on your photo. For instance, you can do following things with this app. - Convert skewed book cover area to plane rectangular photo. - Convert skewed billboard arae to plane rectangular photo. - Put beautiful girl image into poster area of another photo. - Put amazing landscape image into billboard area of another photo. * Warp Out (Skewed area to plane photo) - Select any skewed area in photo using 4 control points. - Convert the selected area to plane rectangular photo automatically. - Adjust width and height ratio manually to get a perfect result. * Warp In (Plane photo to skewed area) - Select any skewed area in photo using 4 control points. - Put any photo into the selected area. - The photo is perspectively transformed automatically to fit into the area.
Screenshots
Verdict
The clearest difference is rating: Calibration Plus at 3.0 against Pic Warp's 1.9. Pic Warp's advantage is update cadence (every 8 months vs every 21 months) and review sentiment (61% vs 50%). On price, ads, in-app purchases and monetization model 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
Calibration Plus costs $2.99 and Pic Warp $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calibration Plus holds the better App Store score, 3.0 against 1.9. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews complicate that: 50% of Calibration Plus's written reviews are positive against 61% of Pic Warp's, so the app with the better star average is not the one people write more warmly about.
Calibration Plus ships an update every 21 months, Pic Warp every 8 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.
| Parameter | Calibration Plus | Pic Warp |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 3.0 (2 ratings) — better | 1.9 (8 ratings) |
| Positive reviews | 50.0% of reviews | 61.1% of reviews — better |
| Number of ratings | 2 | 8 — better |
| Update frequency | Every 21 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Le bord de la piscine | Dongwook Cho |
Customer experience
Calibration Plus
Pic Warp
In-app purchases
Calibration Plus
No in-app purchases
Pic Warp
No in-app purchases
Questions
Is Calibration Plus free?
Is Pic Warp free?
Which has better reviews, Calibration Plus or Pic Warp?
Do Calibration Plus or Pic Warp have ads?
Which is updated more often, Calibration Plus or Pic Warp?
Other comparisons
