Delta Overlap vs Delta Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta Overlap
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DeltaOverlap is dedicated to all the accredited installer technicians. It lets you set the perfect tuning for your Overlap garage door equipped with Silmotion, the new Overlap garage door opener. Simply plug the Bluetooth key in the GDO communication port and connect! It is an essential tool also for a quick and easy system diagnosis. Few examples of the parameters you can set are: • Timer-to-Close (TCC) • Door timing • Current absorption • Light/buzzer timing
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
Screenshots
Verdict
The clearest difference is price: Delta Overlap at Free against Delta Calc's $0.99. Delta Overlap also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.6). Delta Calc's advantage is update cadence (every 3 days vs every 2 months). On ads 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 Overlap is free to download; Delta Calc costs $0.99 up front. Delta Calc sells 3 in-app purchases, starting at $0.99 per month. Delta Overlap asks for nothing beyond the download.
Delta Overlap ships an update every 2 months, Delta Calc every 3 days. The most recent releases landed on September 15, 2026 and June 1, 2026 respectively.
| Parameter | Delta Overlap | Delta Calc |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Gread Elettronica srl | Stephen Coffey |
In-app purchases
Delta Overlap
No in-app purchases
Delta Calc
- Delta Calc Monthly$0.991 Month
- Delta Calc Yearly$4.991 Year
- Delta Calc Lifetime$9.99
