CryptCloudViewer vs SumKey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
SumKey
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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
Verdict
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
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.
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.
| Parameter | CryptCloudViewer | SumKey |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.3 (15 ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 3 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 74 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | ichiro NAKAHARA | Che Wei Li |
In-app purchases
CryptCloudViewer
- coffee$0.99
- fresh orange juice$4.99
- dinner$12.99
SumKey
No in-app purchases









