Comparison

CryptCloudViewer vs SumKey

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

Head to head
About

CryptCloudViewer

Access and manage encrypted files across multiple cloud storage services. Stream media directly from your encrypted cloud with support for various formats and Chromecast.

Highlights
  • Supports Google Drive, Dropbox, OneDrive, and more
  • Rclone, CarotDAV, and Cryptomator encryption
  • Encrypted media playback
  • Software decoder for non-native media
  • Cloud file management (upload, delete, rename)
  • Chromecast support with encoding
Features
Read full description

This is cloud drive viewer with encryption. App supports device folders and remote storages: Google Drive, Dropbox, OneDrive, pCloud, Filen.io, S3, SFTP, WebDAV, Samba. Available encryption: rclone, CarotDAV, Cryptomator and gocryptfs. This app can play media files with keeping encrypted. In addition, this app can play non-native media files (ex. mpeg2) with software decoder. You can edit your cloud storages: upload, make folder, rename, move, delete items. Also this app supports Chromecast, can send media to a device with encoding in app.

About

SumKey

Features
Read full description

Need to do quick math while typing? Stop app-switching. SumKey puts a calculator inside your keyboard: type an expression anywhere (Notes, chats, email) and tap "=" to get the answer, or long-press "=" to keep just the result. Split a bill, quote a price, check a discount: wherever numbers come up, finish the math right there. KEY FEATURES ● Calculate as you type: tap "=" after any expression and the answer appears inline; long-press "=" to keep just the result ● Percent math the way you think: 4500 - 15% gives the discounted amount instantly ● History inside the keyboard: tap to re-insert a previous result or the whole expression; clearing always asks for confirmation ● Customizable toolbar: clear, cursor keys, forward delete, dismiss keyboard. Add, remove, and reorder freely, or create one-tap custom text keys ● Rearrangeable keys: swap the operator column and function keys; the spare key slot can be ( ), 00, 0.00 and more ● f(x) panel for advanced functions: √, x², x^y, sin/cos/tan, ln, log, π and more ● Every calculation rule is a setting: 0–8 decimal places, rounding mode, thousands separators, implicit multiplication, auto-closing parentheses, operator spacing ● Home Screen widget: calculate on your Home Screen (iOS 17+), sharing the keyboard's settings ● Make it yours: light and dark themes that follow the system, 8 accent colors, and your choice of a black or white app icon ● Localized in English, Traditional Chinese, Japanese, and Simplified Chinese PRIVACY: WE CAN'T SEE WHAT YOU TYPE SumKey never asks for Full Access. That is a system-level guarantee: we cannot see, store, or upload anything you type. The keyboard cannot connect to the internet, contains no analytics or tracking, and works fully offline. Your calculation history stays on your device only. ONE-TIME PURCHASE Pay once, own everything. No subscription, no ads, no account, no in-app purchases. SUPPORT Questions or ideas? Email doka.software@gmail.com

Screenshots

CryptCloudViewer4 screens
SumKey4 screens

Verdict

The call

The clearest difference is price: CryptCloudViewer at Free against SumKey's $1.99. CryptCloudViewer also leads on update cadence (every 3 days vs every 9 days). SumKey's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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

CryptCloudViewer is free to download; SumKey costs $1.99 up front. CryptCloudViewer sells 3 one-off in-app purchases. SumKey asks for nothing beyond the download.

UpkeepUpdate frequency

CryptCloudViewer ships an update every 3 days, SumKey every 9 days. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
CryptCloudViewer versus SumKey: the parameters behind the verdict, then further details
ParameterCryptCloudViewerSumKey
PriceFree — better$1.99
Rating4.3 (15 ratings) — better—
Positive reviews71.4% of reviews—
Number of ratings15 — better—
Update frequencyEvery 3 days — betterEvery 9 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.616.0 — better
Further details — not scored
Size74 MB2 MB
Age rating4+4+
Developerichiro NAKAHARAChe Wei Li

In-app purchases

3 purchases

CryptCloudViewer

One-time3
  • coffee$0.99
  • fresh orange juice$4.99
  • dinner$12.99
None

SumKey

No in-app purchases

Questions

Is CryptCloudViewer free?
CryptCloudViewer is free to download, with in-app purchases available.
Is SumKey free?
SumKey costs $1.99, with no in-app purchases.
Do CryptCloudViewer or SumKey have ads?
Neither CryptCloudViewer nor SumKey shows ads.
Which is updated more often, CryptCloudViewer or SumKey?
CryptCloudViewer ships an update every 3 days, and SumKey every 9 days. Most recently, CryptCloudViewer was updated on October 17, 2026 and SumKey on October 11, 2026.

Other comparisons