Personal colorimeter vs Open Docs
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Personal colorimeter
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Accurate skin tone measurement: Quickly measures skin tone using the latest sensor technology. Personal color analysis: Provides warm and cool color classification result
Open Docs
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OpenDocs is a clean, local-first document viewer for the files you already have. Open PDFs, Word, Excel, Markdown, text, CSV, JSON, XML, and RTF files from Files or other apps, then return to them with saved reading history. โข Browse recent files by name, format, and favorites. โข Read text, Markdown, CSV, JSON, XML, and RTF in a focused viewer. โข View PDFs with zoom and efficient page loading. โข Preview DOCX and XLSX while keeping the native full-fidelity viewer path available. โข Share documents or open them in another compatible app. โข Choose light, dark, or system appearance, text size, wrapping, and resume position. OpenDocs does not require an account and includes no ads, analytics, or tracking SDKs. Document references and reading history stay on-device; document contents are not uploaded to OpenDocs or a remote conversion service. The optional Support the author screen loads a QR image from VietQR. Open your files simply, privately, and right when you need them.
Screenshots
Verdict
The clearest difference is iOS requirement: Personal colorimeter at 12.0 against Open Docs's 18.2. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Personal colorimeter ships an update every 2 weeks, Open Docs fortnightly. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.
| Parameter | Personal colorimeter | Open Docs |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Fortnightly โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 โ better | 18.2 |
| Further details โ not scored | ||
| Size | 42 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Korea Fashion Shimri Research Institute Co., Ltd. | Ho Dung |
In-app purchases
Personal colorimeter
No in-app purchases
Open Docs
No in-app purchases
Questions
Is Personal colorimeter free?
Is Open Docs free?
Do Personal colorimeter or Open Docs have ads?
Which is updated more often, Personal colorimeter or Open Docs?
Other comparisons
