Comparison

Conversion vs DS One

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

Head to head
About

Conversion

This utility app provides instant conversions between a wide range of units, including metric, imperial, and currency. It features live exchange rates and supports 33 languages, all within a clean, clutter-free interface.

Highlights
  • Extensive unit categories (12 categories, 96 units)
  • Live, offline-capable currency exchange rates
  • Supports 33 languages and regional number formats
  • Modern, clutter-free interface with fluid animations
  • Full VoiceOver and accessibility support
  • No ads, analytics, or tracking
Features
Read full description

Type a number. Read the answer. That is the entire app. Conversion has been on the App Store since 2012. Version 4 is a complete rebuild — modern, quick, and still refreshingly free of clutter. BOTH UNITS, ALWAYS IN VIEW The two units face each other in the middle of the screen, right where you left them last time. Flick either one to change it, or tap an amount to turn the conversion around. Nothing to drill into. TWELVE CATEGORIES, 96 UNITS Length · Area · Volume · Weight · Temperature · Speed · Pressure · Power · Energy · Time · Computing — and Currency, with more than 160 world currencies. LIVE EXCHANGE RATES Rates refresh on their own and are stored on your device, so conversions still work on a plane or underground. When a rate is out of date the app says so, rather than quietly handing you an old number. YOUR LANGUAGE, YOUR NUMBERS 33 languages. Unit names, decimal separators and numbering systems all follow your region — so a comma lands where a comma belongs, and Arabic and Devanagari numerals are drawn properly. BUILT FOR iOS 26 Liquid Glass, a color for every category, fluid animation, haptics, and Dark Mode throughout. ACCESSIBLE FROM THE START Every control is labeled for VoiceOver. Text scales to the largest accessibility sizes. Reduce Motion is respected. A hardware keyboard drives the whole app. NOTHING COLLECTED No account, no ads, no analytics, no tracking. The app makes one kind of network request — for published exchange rates — and it carries nothing about you. Pay once. No subscription.

About

DS One

This app serves as a comprehensive NAS management tool, unifying video, music, and file handling. It offers extensive format support for media playback, including high-quality video and audio, along with subtitle customization and picture-in-picture functionality. Users can also efficiently browse and manage files directly from their NAS.

Highlights
  • Wide video format support
  • High-quality video playback (HD, 4K, HDR)
  • Subtitle support and adjustment
  • Picture-in-picture video
  • Mainstream and lossless audio support
  • Music lyrics and cover art display
  • NAS file management
Features
Read full description

DS Cloud is an all-in-one NAS management tool that integrates video, music, and file management. Now supporting Synology and Emby. Features of DS Cloud include: 1. Video Functionality: - Wide-ranging video format support: DS Cloud can play various video formats, including .mkv, .avi, .mp4, .mov, .rmvb, .wmv, and more, providing a diverse viewing experience within one player. - High-quality video playback: Supports HD, 4K, HDR, and other video formats for optimal viewing. - Subtitle support: DS Cloud supports embedded and multiple external subtitle formats such as SRT, SSA, SUB, with subtitle adjustment options for the best viewing experience. - Picture-in-picture support: Allows users to browse other apps while watching videos with DS Cloud. 2. Audio Functionality: - Supports mainstream and lossless audio formats, including FLAC, MP3, WMA, APE, OGG, AAC, DTS, PCM, WAV, etc. - Displays music lyrics and cover art for a visually pleasing music library. - Manages playlists and individual songs. - Supports transcoding playback and playback of original audio formats. 3. File Management Functionality: - Quickly browse and view file contents. - Easily manage files with clear identification of various file formats, serving as a bridge between NAS and mobile devices. Thank you for using DS Cloud. Your feedback is valuable to us. Please contact us at 564095922@qq.com if you encounter any issues. For more information, please refer to: "Terms of Service": https://miaomiaolock.com/terms-of-use "Privacy Policy": https://miaomiaolock.com/dscloudprivate

Screenshots

Conversion4 screens
DS One4 screens

Verdict

The call

The clearest difference is price: DS One at Free against Conversion's $0.99. DS One also leads on rating (4.7 vs 3.0) and ratings volume (78 vs 5). Conversion's advantage is in-app purchases (none vs 6). On review sentiment and ads 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

CostPrice · In-app purchases · Ads · Monetization

DS One is free to download; Conversion costs $0.99 up front. DS One sells 4 in-app purchases, starting at $0.99 per month. Conversion asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DS One holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: DS One has 78 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 61% and 60% positive.

UpkeepUpdate frequency

Conversion ships an update every 2 months, DS One monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 2 level
Conversion versus DS One: the parameters behind the verdict, then further details
ParameterConversionDS One
Price$0.99Free — better
Rating3.0 (5 ratings)4.7 (78 ratings) — better
Positive reviews61.0% of reviews — better60.0% of reviews
Number of ratings578 — better
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod, Apple TV — better
Requires iOS26.015.0 — better
Further details — not scored
Size2 MB222 MB
Age rating4+4+
DeveloperDuncan Campbell大为 张

Customer experience

Conversion

Written reviews41 reviews
Positive61.0%
Neutral19.5%
Negative19.5%

DS One

All ratings78 ratings
Positive93.6%
Neutral2.6%
Negative3.8%
Written reviews40 reviews
Positive60.0%
Neutral15.0%
Negative25.0%

In-app purchases

None

Conversion

No in-app purchases

4 purchases

DS One

Subscriptions3
  • DS Cloud Pro - Monthly3 Days trial$0.991 Month
  • DS Cloud Pro - Monthly2 variants$0.991 Month
  • DS Cloud Pro - Annual$7.991 Year
One-time1
  • DS Cloud Pro - Lifetime2 variants$9.99

Questions

Is Conversion free?
Conversion costs $0.99, with no in-app purchases.
Is DS One free?
DS One is free to download, with in-app purchases available.
Which has better reviews, Conversion or DS One?
DS One is rated higher. Conversion averages 3.0 out of 5 from 5 ratings, while DS One averages 4.7 from 78 ratings.
Do Conversion or DS One have ads?
Neither Conversion nor DS One shows ads.
Which is updated more often, Conversion or DS One?
Conversion ships an update every 2 months, and DS One monthly. Most recently, Conversion was updated on October 21, 2026 and DS One on October 24, 2026.

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