Old PDF Reader vs Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Old PDF Reader
Easily browse and view your PDF documents. Adjust the display style in six stages for comfortable reading. Import PDFs directly from your device's share function.
- PDF document browsing
- Adjustable display style
- Import from share button
- Document list management
- Simple interface
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This application is a PDF reader. You can segment the button below to browse through old documents as a PDF. Style can be adjusted in six stages. Please import a PDF document from the share button at the bottom right of iTunes in the first. PDF document read once will be displayed in the top of this screen. To remove the PDF document captured, you can flick on a table cell.
Unit Converter
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Unit Converter - SLOX is a simple and powerful unit conversion app. [Features] • 8 categories: Length, Weight, Temperature, Volume, Area, Speed, Time, Data • Real-time conversion • 8 languages supported (English, Korean, Japanese, Chinese, Spanish, German, French, Portuguese) • Beautiful dark theme • Copy results to clipboard • Conversion formula display [Supported Units] Length: m, km, cm, mm, mi, yd, ft, in Weight: kg, g, mg, lb, oz, t Temperature: °C, °F, K Volume: L, mL, gal, qt, pt, cup, fl oz Area: m², km², cm², ha, ac, ft², in² Speed: m/s, km/h, mph, kn, ft/s Time: s, min, h, d, wk, mo, yr Data: B, KB, MB, GB, TB, bit Convert any unit you need, instantly!
Screenshots
Verdict
The clearest difference is update cadence: Unit Converter at daily against Old PDF Reader's every 24 months. Old PDF Reader's advantage is iOS requirement (7.1 vs 13.0). 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. Neither carries in-app purchases, so what you see is what you pay.
Old PDF Reader ships an update every 24 months, Unit Converter daily. The most recent releases landed on October 2, 2026 and October 19, 2026 respectively.
| Parameter | Old PDF Reader | Unit Converter |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 24 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 7.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 48 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | STUDIO SHIN | SEOKWON YANG |
In-app purchases
Old PDF Reader
No in-app purchases
Unit Converter
No in-app purchases
Questions
Is Old PDF Reader free?
Is Unit Converter free?
Do Old PDF Reader or Unit Converter have ads?
Which is updated more often, Old PDF Reader or Unit Converter?
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