Comparison

Save by OpenArchive vs CalcKey

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

Head to head
About

Save by OpenArchive

This app allows users to securely archive and organize their mobile media. It provides tools for uploading, editing metadata, and sharing content to private servers or the Internet Archive, ensuring long-term preservation and control.

Highlights
  • Upload media to private servers or Internet Archive
  • Edit media metadata (location, notes)
  • Flag media as 'significant'
  • Batch edit media metadata
  • Organize media into project albums
  • Share to Save from other apps
  • Wi-Fi-only upload setting
  • Creative Commons licensing options
Features
Read full description

Save by OpenArchive enables you to safely preserve, organize, and share your mobile media. Designed with and for individuals and organizations working to securely archive media directly from their mobile devices to a server, Save keeps you in control of your media at all times. Features •⁠ ⁠Upload any type of media to a private server or directly to the Internet Archive •⁠ ⁠Edit media metadata, including location and additional notes •⁠ ⁠Flag media as “significant” for organization and/or easy retrieval later •⁠ ⁠Batch edit media — update the metadata of multiple media files at once •⁠ ⁠Create multiple project albums to keep your media organized (e.g. “Summer 2019,” “Workshop photos,” “Kitchen remodel,” etc) •⁠ ⁠Share to Save from other apps on your phone, such as your Photos or voice memos apps •⁠ ⁠“Wi-Fi-only” upload setting, for when cellular data networks are unreliable or expensive •⁠ ⁠Creative Commons licensing options for the media you collect and share •⁠ ⁠Uninterrupted uploads using a foreground service Benefits Preserve Upload your important mobile media to a private server of your choice (using a free and open source platform like Nextcloud or ownCloud). Publish the media publicly to the Internet Archive for resilient, robust preservation by a third-party. Organize Create custom-named Projects to keep your media sorted in ways that make sense to you. Add helpful notes, location, and other contextual information one by one or in bulk. Enable findability and organization with folders in the app that correspond to your own private server. Share Connect to existing project albums created and managed by partners and colleagues. Send media to the Save app from your camera roll and other applications. Secure Save always uses TLS encryption, which encrypts the connection between your mobile device and your chosen destination, whether a private server or the Internet Archive. Save works with server software like Nextcloud that makes it easy to encrypt the data you’ve collected. Help & Support OpenArchive’s FAQ - https://open-archive.org/faq/ Contact us at info[at]open-archive[dot]org About OpenArchive is a team of technologists, ethnographers, and archivists committed to helping people easily preserve and organize their mobile media. We create intuitive, privacy-first decentralized archiving tools and educational resources to preserve history. About Save Save is an intuitive, privacy-first decentralized mobile archiving app that helps people preserve their mobile media for the long term. It offers users greater control over their media by providing tools for authentication, verification, privacy, licensing, and flexible storage options for long-term access and reuse. Save addresses the gaps in the current online ecosystem existing around the a) ethical short-term collection and b) long term preservation of sensitive mobile media. We provide mobile-centered, scalable, industry-standard, ethical, intuitive, easy to use tools for at-risk communities to pseudonymously preserve and authenticate their media so that it will be accessible and maintain its provenance in the future. Links Terms of Service: https://open-archive.org/privacy/#terms-of-service Privacy Policy: https://open-archive.org/privacy/#privacy-policy

About

CalcKey

Perform calculations directly within any app using a smart keyboard extension. Get instant results for basic and scientific equations, with a history of your calculations. Enjoy a seamless typing experience and smart formatting.

Highlights
  • Keyboard calculator extension
  • Real-time results
  • Basic & scientific calculators
  • Calculation history
  • Smart formatting
  • Standalone app option
Features
Read full description

CalcKey – Smart Calculator Keyboard Calculate Instantly. Anywhere. Anytime. No more switching between apps just to do quick math! With CalcKey, you get a powerful calculator app and an intelligent keyboard extension — so you can calculate right inside Messages, Notes, Mail, or any app without ever leaving your screen. Key Features: - Keyboard Calculator Extension – Instantly calculate while chatting or typing. Works in Messages, WhatsApp, Notes, and more! - Real-Time Results – Get instant answers as you type. - Basic & Scientific Calculators – From quick sums to advanced equations, CalcKey does it all. - Calculation History – View, copy, or reuse past results easily. - Haptic Feedback – Enjoy subtle vibrations for a smooth typing experience. - Smart Formatting – Supports decimals, thousands separators, and clear result display. - Works Everywhere – Use it as a standalone app or directly from your keyboard. Perfect for messaging apps! Reply, calculate, and chat — all without leaving the conversation. CalcKey makes multitasking effortless. Subscription Pricing, Policy & Terms: - Monthly Plan - $3.99/per month - LifeTime Access - $19.99/One time charge - Subscription automatically renews unless auto-renew is turned off at least 24 - hours before the end of the current period. - Payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for renewal within 24-hours prior to the end of the current period. - No cancellation of the current subscription is allowed during the active subscription period. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Terms & Condition: https://www.righttracksit.com/calckey/terms Privacy Policy: https://www.righttracksit.com/calckey/privacy-policy

Screenshots

Save by OpenArchive4 screens
CalcKey4 screens

Verdict

The call

The clearest difference is in-app purchases: Save by OpenArchive at none against CalcKey's 2. Save by OpenArchive also leads on rating (4.3 vs 4.0). CalcKey's advantage is update cadence (every 3 weeks vs every 2 months). On price, 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

Both are free to download. CalcKey sells 2 in-app purchases, starting at $3.99 per month. Save by OpenArchive asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Save by OpenArchive holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 14 and 10 respectively.

UpkeepUpdate frequency

Save by OpenArchive ships an update every 2 months, CalcKey every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Save by OpenArchive versus CalcKey: the parameters behind the verdict, then further details
ParameterSave by OpenArchiveCalcKey
PriceFreeFree
Rating4.3 (14 ratings) — better4.0 (10 ratings)
Positive reviews—33.3% of reviews
Number of ratings14 — better10
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615 — better
Further details — not scored
Size26 MB14 MB
Age rating12+4+
DeveloperOpenArchive LLCRight Tracks IT Limited

Customer experience

Save by OpenArchive

All ratings14 ratings
Positive78.6%
Neutral7.1%
Negative14.3%

CalcKey

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

None

Save by OpenArchive

No in-app purchases

2 purchases

CalcKey

Subscriptions1
  • CalcKey Pro Monthly3 Days trial$3.991 Month
One-time1
  • One time purchase$19.99

Questions

Is Save by OpenArchive free?
Save by OpenArchive is free to download, with no in-app purchases.
Is CalcKey free?
CalcKey is free to download, with in-app purchases available.
Which has better reviews, Save by OpenArchive or CalcKey?
Save by OpenArchive is rated higher. Save by OpenArchive averages 4.3 out of 5 from 14 ratings, while CalcKey averages 4.0 from 10 ratings.
Do Save by OpenArchive or CalcKey have ads?
Neither Save by OpenArchive nor CalcKey shows ads.
Which is updated more often, Save by OpenArchive or CalcKey?
Save by OpenArchive ships an update every 2 months, and CalcKey every 3 weeks. Most recently, Save by OpenArchive was updated on November 3, 2026 and CalcKey on November 5, 2026.

Other comparisons