Comparison

OneTools vs Simple Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OneTools

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OneTools brings together practical utilities for everyday tasks. Scan QR codes, compress photos, convert units, turn speech into text, and add watermarks in a clean, fast workflow. Built for quick actions, simple sharing, and daily use. Designed for daily use, OneTools keeps the experience simple, polished, and easy to pick up whenever you need something done fast. Features Calculator Use standard, scientific, programmer, and date calculation modes for everyday math and advanced tasks. Unit Converter Convert length, weight, area, temperature, volume, time, and speed in seconds. QR Toolkit Generate QR codes for text, links, Wi-Fi, and phone numbers, or scan codes instantly with your camera. Watermark Add custom text watermarks to your images with adjustable size, opacity, rotation, and position. Image Compressor Reduce image size with multiple compression levels while keeping the result ready to save and share. Voice to Text Record speech and turn it into live text with support for multiple languages. Why OneTools Clean and easy-to-use interface Fast access to everyday utility tools Designed for quick tasks and repeat use Flexible Pro subscription with restore support across your devices Whether you need to scan, convert, calculate, compress, or capture text from speech, OneTools helps you do it all in one place.

About

Simple Viewer

Features
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Simple Viewer opens files. Quietly, quickly, and without asking for anything in return. Share any file from any app — Mail, Messages, Files, a browser, a cloud drive — and Simple Viewer renders it the way it was meant to be read. No account. No upload. Files stay on your device. It is designed for the moment when you just need to see what's inside a file. RENDERED WITH CARE • PDF with smooth scrolling and pinch-to-zoom • Markdown with typography that reads • Source code with precise syntax highlighting • JSON, XML, and YAML, pretty-printed • CSV and TSV, as readable tables • Excel spreadsheets (XLSX) • Word documents (DOCX) • ZIP archives, browsed inside • Plain text, logs, and scripts • x509 certificates BUILT FOR iPHONE AND iPAD • Open from any app via the iOS share sheet • Recent files, one tap away • Orientation-aware on iPad • Works offline. Always. NOTHING YOU DON'T NEED No sign-up. No subscription. No ads. No tracking. No cloud sync. No bloat. Just a clean surface for reading what you already have. Because simple is elegant.

Screenshots

OneTools4 screens
Simple Viewer3 screens

Verdict

The call

The clearest difference is update cadence: OneTools at weekly against Simple Viewer's monthly. OneTools also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

OneTools ships an update weekly, Simple Viewer monthly. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

Scorecard2 real differences Ā· 4 level
OneTools versus Simple Viewer: the parameters behind the verdict, then further details
ParameterOneToolsSimple Viewer
PriceFreeFree
Update frequencyWeekly — betterMonthly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size3 MB6 MB
Age rating4+4+
DeveloperHuaiBor Technology Co.,LtdSTLink

In-app purchases

None

OneTools

No in-app purchases

None

Simple Viewer

No in-app purchases

Questions

Is OneTools free?
OneTools is free to download, with no in-app purchases.
Is Simple Viewer free?
Simple Viewer is free to download, with no in-app purchases.
Do OneTools or Simple Viewer have ads?
Neither OneTools nor Simple Viewer shows ads.
Which is updated more often, OneTools or Simple Viewer?
OneTools ships an update weekly, and Simple Viewer monthly. Most recently, OneTools was updated on October 8, 2026 and Simple Viewer on October 3, 2026.

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