Comparison

電卓&ストップウォッチ vs Jumpstash

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

Head to head
About

電卓&ストップウォッチ

This app combines a stopwatch, numerical counter, and calculator into a single, easy-to-use interface. It allows for simultaneous operation of all three tools, simplifying daily tasks.

Highlights
  • Simultaneous operation
  • Stopwatch
  • Numerical counter
  • Calculator
  • Simple interface
Features
Read full description

日々の生活でよく使う「ストップウォッチ」「数値カウンター」「電卓」を1つの画面で同時に操作できるように設計しました。 シンプルな簡単操作でそれぞれの機能を独立して使用することができます。

About

Jumpstash

Securely store backup codes for your accounts in iCloud Keychain. Access them from any device logged into iCloud, ensuring you never lose access to your important services.

Highlights
  • Secure backup code storage
  • iCloud Keychain integration
  • Cross-device access
  • Account lockout prevention
  • Token generation backup
Read full description

Two-factor codes, everywhere you sign in. Jumpstash is a beautifully native authenticator for the entire Apple ecosystem. Glance at your wrist, AutoFill in Safari, scan on your phone - your codes are with you wherever you log in. WHAT MAKES JUMPSTASH DIFFERENT - APPLE WATCH COMPLICATION Your most-used verification code, right on your watch face. Inline, circular, or rectangular — each with a live 30-second countdown ring. No more pulling out your phone. - SAFARI & SYSTEM AUTOFILL Tap a verification-code field in Safari or any iOS 18+ app, choose Jumpstash, done. Zero copy-paste. - MAC MENU-BAR APP One click in the menu bar, see your code, copy, dismiss. No System Settings detour. - FACE ID & TOUCH ID LOCK Codes hide behind biometric authentication. Backgrounding the app instantly draws a privacy curtain — no peeking from the app switcher. - LOSSLESS BACKUP & PORTABILITY Export every code as JSON for a perfect restore, plus standard otpauth:// URIs and QR codes. Your codes are yours — take them anywhere, anytime. - iCLOUD KEYCHAIN SYNC Your codes follow you across iPhone, iPad, Mac, and Apple Watch automatically — synced by Apple, end-to-end encrypted. - PRIVATE BY DEFAULT No accounts. No servers. No telemetry. Jumpstash never sees your secrets — they live in your iCloud Keychain, protected by Apple's own security model. DESIGNED FOR YOU IF… > You 2FA across dozens of services every day > You want a glanceable code on your wrist without opening your phone > You care about export portability and don't want to be locked into one ecosystem > You prefer a focused, single-purpose app over a sub-feature buried in another tool WHAT ABOUT APPLE PASSWORDS? Apple's Passwords app does TOTP, and it does a good job. For most people, it's enough. Jumpstash exists for users who treat 2FA as a daily ritual: a watch complication for instant access, true export so your codes are never locked behind a one-way iCloud door, and a UI built around codes as the first-class experience instead of a sub-feature. WHAT'S INSIDE - QR code scanner with one-tap import - otpauth:// URL handler (tap a link in Messages, Mail, or any app to import) - Manual entry with a live preview that animates as you type - Edit any code (name, issuer, or secret) without losing the entry - Delete with confirmation - Global search and Contacts-style #-A-Z index with drag-scrubbing for fast navigation across many codes - Tap any code to copy it - Live countdown ring on every card - Support for SHA-1, SHA-256, SHA-512 algorithms - Support for custom periods (30s, 60s) and digit lengths (6, 7, 8) PRIVACY & SECURITY Jumpstash uses Apple's iCloud Keychain as its sole storage and sync mechanism. Your TOTP secrets are encrypted end-to-end by Apple, available only to your devices. No analytics SDKs. No tracking. No accounts to create. No servers to trust. Made by Danger Close Security Co.

Screenshots

電卓&ストップウォッチ1 screens
Jumpstash3 screens

Verdict

The call

The clearest difference is ads: Jumpstash at none against 電卓&ストップウォッチ's shown. Jumpstash also leads on update cadence (every 2 weeks vs every 19 months) and monetization model (free vs ad-supported). 電卓&ストップウォッチ's advantage is iOS requirement (13.0 vs 16.6). On price, review sentiment and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

電卓&ストップウォッチ ships an update every 19 months, Jumpstash every 2 weeks. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

Scorecard5 real differences · 5 level
電卓&ストップウォッチ versus Jumpstash: the parameters behind the verdict, then further details
Parameter電卓&ストップウォッチJumpstash
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 19 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac, Apple Watch — better
Requires iOS13.0 — better16.6
Further details — not scored
Size19 MB17 MB
Age rating4+4+
DeveloperAmetiarMichael Mackintosh II

Customer experience

電卓&ストップウォッチ

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Jumpstash

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

電卓&ストップウォッチ

No in-app purchases

None

Jumpstash

No in-app purchases

Questions

Is 電卓&ストップウォッチ free?
電卓&ストップウォッチ is free to download, with no in-app purchases.
Is Jumpstash free?
Jumpstash is free to download, with no in-app purchases.
Do 電卓&ストップウォッチ or Jumpstash have ads?
電卓&ストップウォッチ shows ads; Jumpstash does not.
Which is updated more often, 電卓&ストップウォッチ or Jumpstash?
電卓&ストップウォッチ ships an update every 19 months, and Jumpstash every 2 weeks. Most recently, 電卓&ストップウォッチ was updated on September 8, 2026 and Jumpstash on September 14, 2026.

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