# GridFix: Perspective Fix — Perspective & Lines Correction

> Perspective & Lines Correction (iPhone/iPad app by PEI-CHUN CHAO.)

- Source: https://appshunter.io/ios/app/gridfix-perspective-fix/id6792030548 (this page in markdown: same URL + `.md`)
- Developer: [PEI-CHUN CHAO](https://appshunter.io/developer/6792030550)
- Category: Photo & Video, Graphics & Design
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 5 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-07-25
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/gridfix-perspective-fix/id6792030548/reviews.md

## What is GridFix?

Tilt your camera up at a building and the verticals lean inward. Let your hand tip and the horizon goes crooked. GridFix fixes this the most intuitive way possible: draw guide lines along the edges that should be straight, and the app computes the perspective correction that makes them truly vertical and horizontal.

And now, you can get it right at the moment you shoot.

LIVE-CORRECTED CAMERA
- The corrected image shows live in the viewfinder. What you see is what you get, no guesswork afterwards
- A tilt readout shows your pitch and roll at all times
- Correct verticals only, or auto-level the horizon as well
- Pinch to zoom, EV compensation scale, long-press AE/AF lock, self-timer, volume-button shutter
- Level sensor calibration: a fixed offset from your case or sensor tolerance is measured once and subtracted from then on
- The session gallery lets you review shots, compare with the original, or send one straight into the editor

EDIT IMPORTED PHOTOS
- Guide-line correction: no blind slider fiddling, just show the app which lines should be straight
- Double-tap to zoom: magnify right where you are working and trace window frames and beams precisely
- A loupe keeps the edge visible while you drag, positioned for right- or left-handed use
- Lens distortion correction: fixes the outward bow of ultra-wide edges, which perspective correction alone cannot fix
- Fine-tuning: adjust every axis manually after the correction
- Crop, rotate, flip, and auto-trim the blank edges correction leaves behind
- Edit history: every session is saved automatically, so you can reopen and continue any time

IMPORT AND EXPORT
- Import from Photos, Files and iCloud Drive, or share into GridFix from any other app
- Export JPEG, HEIF, PNG or TIFF, at original resolution or a custom size
- Everything runs on your device: no account, no network, your photos never leave your phone

FREE AND SUBSCRIPTION
Every correction tool is free: guide lines, lens distortion, fine-tune sliders, cropping and the live-corrected camera are all fully usable, with unlimited viewfinder time. The limits are only on output: 3 editor exports a day, 10 camera saves a day, both at up to 2048px on the long edge, JPEG, without capture info or location (the capture date and orientation are kept).

Subscribing unlocks:
- Unlimited exports and unlimited camera saves
- Original-resolution export (up to 48MP; the free tier caps the long edge at 2048px)
- RAW import (ProRAW, DNG); PNG, TIFF and HEIF export at maximum encoder quality
- Full EXIF kept on exports and captures (lens, exposure, location)
- Live-corrected video recording (high-bitrate HEVC)

GridFix does one thing well: it makes crooked lines straight. No color grading, no filters, no object removal.

Available in English, Traditional Chinese, Simplified Chinese, Japanese, Korean, German, French and Spanish.

Privacy Policy: https://gridfixapp.com/policy/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| GridFix 訂閱（月繳） | $2.99 | per month |
| GridFix 訂閱（年繳） | $14.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| GridFix 終身買斷 | $39.99 | one-time |



## Version history (last 4 releases)

### 1.2 — 2026-08-11

This update

- Five new interface languages: Simplified Chinese, Korean, German, French and Spanish. Eight in total, alongside Traditional Chinese, English and Japanese. Switch anytime in Settings.
- Your camera allowance at a glance: the shots remaining today now show right above the shutter (10 free saves a day; unlimited with a subscription)
- Clearer subscription page: all seven benefits are now listed, including HEIF/MAX capture formats and video recording
- Privacy improvement: free-tier exports no longer carry lens settings, exposure data or GPS location. Only the capture date and orientation are kept. Subscriber exports keep full EXIF.
- Other interface refinements

### 1.1 — 2026-08-07

即時校正相機
不必等到事後才修 —— 校正後的畫面直接顯示在觀景窗裡，拍下來就是正的。內含傾角指示器、可切換是否自動轉正水平、雙指縮放、EV 補償、長按鎖定 AE/AF、自拍倒數與音量鍵快門。另提供水平感測校正，用來扣除手機殼或感測器造成的固定偏移。拍攝不限次數，免費版即可完整使用（輸出沿用免費版的解析度與格式限制）。

即時校正錄影（訂閱功能）
以校正後的畫面直接錄影，可選 HEVC 高位元率編碼。

編輯紀錄
每一次編輯都會自動保存，之後可以從「編輯紀錄」重新開啟，繼續調整或重新輸出。

鏡頭變形校正
超廣角（0.5x）拍攝時，畫面邊緣的直線會向外彎曲，這種變形是透視校正無法處理的。新增「鏡頭變形」滑桿，可先把彎曲的線條拉直，再進行透視校正。對 RAW 檔與非 iPhone 相機拍攝的照片特別有用。

更多匯入方式
・可從「檔案」App 與 iCloud 雲碟匯入照片，RAW 使用者不必再先存進相簿
・可從「照片」或其他 App 直接分享照片進 GridFix

其他
・新增 English 與日本語介面
・重做功能，以及購買失敗時會明確說明原因
・多項穩定性與效能修正
・我愛我的兩個女兒，安妞與波妞！

### 1.0.1 — 2026-07-27

・修正雙指縮放偶爾沒有反應的問題
・改善照片平移流暢度，操作更貼近系統原生手感
・雙擊照片可快速放大至點擊位置
・我愛我的女兒

### 1.0 — 2026-07-25

No release notes.

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## More apps by PEI-CHUN CHAO

- [BlurStack](https://appshunter.io/ios/app/blurstack/id6795997699)

All apps by PEI-CHUN CHAO: https://appshunter.io/developer/6792030550

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*