Comparison

HiMemo2 vs Amethyst Authenticator

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

Head to head
About

HiMemo2

Organize information with a simple, hierarchical structure. Easily add, edit, and view data in a tree format, and export it to other apps. Syncs across Apple devices and is accessible on Apple Watch.

Highlights
  • Hierarchical data entry and management
  • Cross-device sync (iPhone, iPad, Mac)
  • Apple Watch browsing
  • Enhanced search functionality
  • Simple and intuitive UI
  • Plain text and HTML export
Features
Read full description

An enhanced version of HiMemo, an easy and convenient hierarchical memo app, is now available! For example, there is a surprising amount of information that has a hierarchical structure, such as information linked to regions and organizational charts. Normally, such information is recorded in bulleted list format in the memo app, but adding or editing information is surprisingly troublesome. Inadvertently, problems such as breaking the hierarchical relationship will occur. With HiMemo2, information can be recorded hierarchically with a simple operation like bulleted list format, and it is easy to add or modify. It is also possible to display a tree that gives a bird's-eye view of the whole, and to export information to other apps and SNS in plain text format or HTML format. Features of HiMemo2. - You can easily enter and manage data with a hierarchical structure. - Share data between multiple iPhones, iPads, Macs (sync with the same Apple ID). - You can browse the data on your Apple Watch. The following functions have been enhanced and improved from HiMemo. - Data is synchronized with HiMemo. - Linked with Apple Watch. You can browse the data on your Apple Watch. - The search function has been enhanced, and you can now search across memos. - The UI is simpler and easier to understand. Data will be inherited from HiMemo, so if you are using iOS 15 or later, we recommend migrating to HiMemo2.

About

Amethyst Authenticator

Read full description

Amethyst Authenticator is Part of the Amethyst Family. You can access and manage your credentials in the iOS App and later also on macOS and in the Amethyst Browser.

Screenshots

HiMemo24 screens
Amethyst Authenticator3 screens

Verdict

The call

The clearest difference is update cadence: Amethyst Authenticator at every 3 days against HiMemo2's monthly. Amethyst Authenticator also leads on iOS requirement (18.2 vs 26.0). HiMemo2's advantage is device support (4 vs 1). On price, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HiMemo2 ships an update monthly, Amethyst Authenticator every 3 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard3 real differences ยท 5 level
HiMemo2 versus Amethyst Authenticator: the parameters behind the verdict, then further details
ParameterHiMemo2Amethyst Authenticator
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyMonthlyEvery 3 days โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPad, Mac, Apple Watch โ€” betteriPhone
Requires iOS26.018.2 โ€” better
Further details โ€” not scored
Size2 MB3 MB
Age rating4+4+
DeveloperHiroyuki KawaiMia Lina Koring

In-app purchases

None

HiMemo2

No in-app purchases

None

Amethyst Authenticator

No in-app purchases

Questions

Is HiMemo2 free?
HiMemo2 is free to download, with no in-app purchases.
Is Amethyst Authenticator free?
Amethyst Authenticator is free to download, with no in-app purchases.
Do HiMemo2 or Amethyst Authenticator have ads?
Neither HiMemo2 nor Amethyst Authenticator shows ads.
Which is updated more often, HiMemo2 or Amethyst Authenticator?
HiMemo2 ships an update monthly, and Amethyst Authenticator every 3 days. Most recently, HiMemo2 was updated on October 27, 2026 and Amethyst Authenticator on October 28, 2026.

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