Engineering Calculator vs Countdown Widget & Days
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engineering Calculator
This utility app helps users convert units and calculate tips, primarily for those in the US. It operates offline and aims for minimal user interaction to provide quick results. Useful for avoiding misunderstandings in business dealings due to unit differences.
- Unit conversion
- Tip calculation
- Offline functionality
- Minimalist interface
- Business negotiation aid
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米国（アメリカ）で生活するエンジニアのための単位換算、チップ計算ができるアプリです。 特にエンジニアである必要もないですが。。。 オフラインで動作可能、広告もありません。 極力少ない操作で結果が出るようになっています。 米国企業などと商談を行うときには単位の相違によって誤解が生じることが多々あります。 このアプリを使って手早く単位変換ができれば、早く理解出来、結果商談の成功に繋がります。
Countdown Widget & Days
This app helps you visualize time to upcoming events or track time since past milestones. Customize countdowns with personalized backgrounds and add them as widgets to your Home and Lock Screen. Receive smart reminders for approaching dates and share your countdowns with others.
- Countdown and count-up timers
- Customizable Home and Lock Screen widgets
- Personalized backgrounds and themes
- Smart event reminders
- Easy countdown sharing
- Ad-free experience
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Count down to birthdays, trips, and holidays on your Home & Lock Screen. Photo widgets, no ads, one-time Premium, not a subscription. From vacations and birthdays to anniversaries, goals, and deadlines, stay excited about what’s next, and celebrate how far you’ve come with customizable countdown and count-up widgets on iPhone. Free: • Countdown & Count-Up: days until an event, or days since a milestone • Home, Lock Screen, and Extra Large widgets, plus Live Activities on Dynamic Island • Card looks and Polaroid frames; birthday and holiday templates • Import events from Calendar • Reminders as the day gets closer, and confetti when it arrives • Easy sharing Premium (one-time unlock, no subscription): • Unlimited events • Extra looks, fonts, photos, and templates. Preview in the editor before you save • Skip weekends so only workdays count until a trip or deadline • Watermark-free sharing • All future updates included What people say “I use this app whenever I have a vacation or something exciting coming up.” “This one truly stands out for its beautiful iOS widgets and easy-to-use interface.” No ads. No subscriptions. Download free and start your first countdown. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Engineering Calculator at 4.5 against Countdown Widget & Days's 4.0. Engineering Calculator also leads on in-app purchases (none vs 1) and device support (3 vs 1). Countdown Widget & Days's advantage is ads (none vs shown) and update cadence (every 2 weeks vs monthly). On price 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
Both are free to download. Countdown Widget & Days sells 1 one-off in-app purchase. Engineering Calculator asks for nothing beyond the download.
Engineering Calculator holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively.
Engineering Calculator ships an update monthly, Countdown Widget & Days every 2 weeks. The most recent releases landed on September 23, 2026 and October 4, 2026 respectively.
| Parameter | Engineering Calculator | Countdown Widget & Days |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 4.0 (7 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 7 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Masato Kanazawa | Costhap |
Customer experience
Engineering Calculator
Countdown Widget & Days
In-app purchases
Engineering Calculator
No in-app purchases
Countdown Widget & Days
- Lifetime Unlock$1.99
Questions
Is Engineering Calculator free?
Is Countdown Widget & Days free?
Which has better reviews, Engineering Calculator or Countdown Widget & Days?
Do Engineering Calculator or Countdown Widget & Days have ads?
Which is updated more often, Engineering Calculator or Countdown Widget & Days?
Other comparisons
