Delta Calc vs ChatBlockus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta Calc
Quickly calculate percent changes, discounts, and financial gains without complex math. Solve for any of the three values in the percent change formula with an intuitive interface and fun animations.
- Calculate percent changes
- Solve for any variable in the formula
- Customizable decimal places
- Haptic feedback
- Fun animations
- Adjustable keyboard buttons
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A fast, easy, and fun-to-use percent change calculator. Now you can quickly calculate discounts, financial gains, and percent changes without having to use Excel, Google, or do the long math. Delta Calc can solve for any of the three values within the percent change formula. It solves for the a, b, or c value in the percent change formula ((b - a) / a) * 100 = c. Other features include: - Haptic feedback (can be disabled if desired) - Change the number of decimal places displayed in the result (from 0 to 10) - Fun animation when tapping the swap button (warning: could become addictive) - Delightful to tap number pad buttons - Enable and disable keyboard buttons Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://deltacalc.app/privacy Support: https://deltacalc.app/support
ChatBlockus
This Safari extension allows users to block comment sections on websites, providing a cleaner browsing experience. It is designed exclusively for Safari browsers on Apple devices.
- Blocks comment sections
- Safari extension
- Cleaner browsing experience
- Works on iPhone and iPad
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ChatBlockus is a Safari extension to block comment sections Safari extensions only work in Safari. They don't work in Google Chrome, Firefox, etc.
Screenshots
Verdict
The clearest difference is rating: Delta Calc at 5.0 against ChatBlockus's 1.0. Delta Calc also leads on price ($0.99 vs $1.99). ChatBlockus's advantage is in-app purchases (none vs 3) and update cadence (daily vs every 3 days). On ratings volume, ads, monetization model 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
Delta Calc costs $0.99 and ChatBlockus $1.99 up front. Delta Calc sells 3 in-app purchases, starting at $0.99 per month. ChatBlockus asks for nothing beyond the download.
Delta Calc holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Delta Calc ships an update every 3 days, ChatBlockus daily. The most recent releases landed on June 1, 2026 and June 28, 2026 respectively.
| Parameter | Delta Calc | ChatBlockus |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 5.0 (2 ratings) — better | 1.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 days | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Stephen Coffey | Lucas Exequiel Di Tomase |
Customer experience
Delta Calc
ChatBlockus
In-app purchases
Delta Calc
- Delta Calc Monthly$0.991 Month
- Delta Calc Yearly$4.991 Year
- Delta Calc Lifetime$9.99
ChatBlockus
No in-app purchases
