Comparison

Kantu vs Side Space

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

Head to head
About

Kantu

This tool allows you to view a wide range of image formats, including those not natively supported by your device. It integrates with your file system and other apps to open image files, offering thumbnail previews and Quick Look functionality.

Highlights
  • External image browsing
  • Support for unsupported formats
  • System native file system integration
  • Open image files from other apps
  • Image file thumbnails
  • Quick Look support
Features
Read full description

Kantu is a image browsing tool that provides external image browsing support for images in other apps, such as email attachments. If you are unable to open the view for the image format that is not natively supported for iOS, you can use this tool to achieve your purpose. Features: * Support system native file system. * Support other apps Open image files in Kantu. * Support image file thumbnails. * Support for Quick Look. Supported image formats: * JPG * JPEG-2000 * TIFF * BMP * ICO * ICNS * GIF * PNG (APNG) * WebP * FLIF * AVIF * HEIC * SVG * BPG If you have any questions, or suggestions, you can use the feedback provided in the app to tell us.

About

Side Space

Create isolated digital environments on your device to manage multiple accounts for web services. Each environment can store its own web sessions, notes, photos, and videos separately, with optional privacy features and passcode protection.

Highlights
  • Multiple isolated environments
  • Separate web sessions and logins
  • Private, hidden spaces
  • On-device data storage
  • Proxy support per space
  • Notes and photo storage
Features
Read full description

SideSpace keeps several separate environments on one iPhone or iPad. Each Space has its own web sessions, its own notes, its own photos, and its own lock. TWO ACCOUNTS, ONE PHONE Sign in to the same service twice — one account in your Work Space, another in Personal — and the two never see each other. Each Space keeps its own cookies and its own sign-ins, so switching Space switches everything at once. No signing out, no re-entering passwords. WHAT LIVES IN A SPACE • Web apps you pin, each opening straight to the service you signed into in that Space • A browser for everything else, with its own tabs and history • Notes • Photos and videos, kept inside the Space and never added to your Photos library • A camera that saves directly into the Space it was opened from PRIVATE SPACES A Space can be marked Private. Private Spaces are not listed at all until you unlock them — their names stay hidden, not just their contents, so handing someone your phone does not show them what you keep separate. Unlock with Face ID, or with a passcode that is separate from your device's own code. YOUR DATA STAYS ON YOUR PHONE There is no account to create and no server to sync to. Everything a Space holds is stored on your device. Export a backup to a file whenever you want one. STARTS WITH SOMETHING USEFUL Pick what a Space is for — work, selling, studying, creating — and it arrives with the apps that usually go with it. You see the full list and approve it before anything is created. A PROXY PER SPACE Spaces already keep separate logins, but they share one connection. Point a Space at your own proxy and its web traffic leaves by its own route, while your other Spaces are untouched. You bring the proxy — SideSpace runs no servers and sells no bandwidth. A NOTE ON WHAT THIS IS SideSpace runs services in isolated web sessions. It does not clone or modify any app, and it is not affiliated with, endorsed by, or sponsored by any service you add. Web sign-ins are not included in backups, and web push notifications are not available in a web session — if you need alerts from a service, keep its own app installed alongside. SideSpace Premium unlocks unlimited Spaces, private Spaces, and ad blocking. • Yearly — $19.99 per year • Monthly — $5.99 per month • Weekly — $2.99 per week • Lifetime — $39.99, one-time purchase (not a subscription) Try every Premium feature free for 24 hours, once: no subscription, nothing charged. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Payment is charged to your Apple Account at confirmation of purchase. Manage or cancel anytime in Settings > Apple Account > Subscriptions. Privacy Policy: https://sangcaolabs.com/apps/sidespace/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Kantu4 screens
Side Space4 screens

Verdict

The call

The clearest difference is price: Side Space at Free against Kantu's $1.99. Side Space also leads on rating (4.5 vs 1.5) and update cadence (every 3 days vs every 9 days). Kantu's advantage is in-app purchases (none vs 4). On ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Side Space is free to download; Kantu costs $1.99 up front. Side Space sells 4 in-app purchases, starting at $2.99 per 7 days. Kantu asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Side Space holds the better App Store score, 4.5 against 1.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Kantu ships an update every 9 days, Side Space every 3 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

Scorecard6 real differences · 4 level
Kantu versus Side Space: the parameters behind the verdict, then further details
ParameterKantuSide Space
Price$1.99Free — better
Rating1.5 (2 ratings)4.5 (2 ratings) — better
Positive reviews30.8% of reviews—
Number of ratings22
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhoneiPhone, iPad — better
Requires iOS26.017.0 — better
Further details — not scored
Size17 MB18 MB
Age rating4+17+
Developer俊锋 仝Sang Cao

Customer experience

Kantu

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews13 reviews
Positive30.8%
Neutral23.1%
Negative46.2%

Side Space

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Kantu

No in-app purchases

4 purchases

Side Space

Subscriptions3
  • Weekly$2.997 Days
  • Monthly$5.991 Month
  • Yearly$19.991 Year
One-time1
  • Lifetime$39.99

Questions

Is Kantu free?
Kantu costs $1.99, with no in-app purchases.
Is Side Space free?
Side Space is free to download, with in-app purchases available.
Which has better reviews, Kantu or Side Space?
Side Space is rated higher. Kantu averages 1.5 out of 5 from 2 ratings, while Side Space averages 4.5 from 2 ratings.
Do Kantu or Side Space have ads?
Neither Kantu nor Side Space shows ads.
Which is updated more often, Kantu or Side Space?
Kantu ships an update every 9 days, and Side Space every 3 days. Most recently, Kantu was updated on October 31, 2026 and Side Space on October 29, 2026.

Other comparisons