OffOf vs echo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OffOf
This app simplifies percentage calculations for shopping discounts and finding a percentage of a number. It offers a clean interface with satisfying sound and haptic feedback for a delightful user experience.
- Calculate percentage OFF
- Calculate percentage OF
- Shopping discount calculations
- Mechanical keyboard sounds
- Haptic feedback
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A beautiful percentage calculator. OffOf helps you calculate to percentage OFF of a particular number, and the percentage OF a particular number. OffOf is NOT a full calculator. Your device already comes with a great calculator. OffOf is a Percentage Calculator ONLY. • 35% OFF Instantly know how much you're going to spend while shopping. What is the cost of that $18.99 t-shirt when its 35% off? OffOf makes it easy to calculate. Simply enter 35% as the "Percentage" and 18.99 as the "Amount" and OffOf will show you how much you'll be spending after the discount. • 16% OF What is 16% of 2,458? OffOf will get you that answer instantly. Just enter 16% as the "Percentage" and 2,458 as the "Amount" and you'll know right away. • Real, satisfying mechanical keyboard sounds • Delightful haptic feedback on button presses and more
echo
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Echo is notes at the speed of a text. Open, type, send. Make quick lists. Sketch ideas. Use hashtags to organize. Start threads to group thoughts. Pin important notes. Search is instant. Sync across devices. Private by default. Minimal by design.
Screenshots
Verdict
The clearest difference is update cadence: echo at every 3 days against OffOf's every 59 months. OffOf's advantage is price ($0.99 vs $2.99) and device support (5 vs 1). On ads 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
OffOf costs $0.99 and echo $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OffOf ships an update every 59 months, echo every 3 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.
| Parameter | OffOf | echo |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | 4.6 (11 ratings) — better | — |
| Positive reviews | 60.7% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 59 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac, Apple Watch, Vision Pro — better | iPhone |
| Requires iOS | 17.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Daeo Corp. Software | Arjun Mahanti |
Bugs and requests
OffOf
Reported bugs
3 issues- Not compatible with new iOS updates
- App no longer opens/works
- Freezes and force closes
Requested features
5 requests- Make it a fully functional calculator
- Update to new software/iOS versions
- Show final price after discount
- Auto clear fields on tap
- Update for X screens
echo
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OffOf
No in-app purchases
echo
No in-app purchases
