Instant Unit Calc vs DELTAMin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Instant Unit Calc
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Simple Calculator combines a calculator and a unit converter in one app -- see your result converted into other units as you type, no switching required. Key features: - Handles complex expressions with parentheses, not just the four basic operations - An always-visible conversion panel across 5 categories: length, weight, volume, area, and temperature - Mixed-unit math like "2 cm + 3 kg" -- results are kept per unit instead of forcing a wrong conversion - Real dimensional analysis: "3 m × 4 m = 12 m²" -- multiplying and dividing changes the unit correctly - Cross-category multiplication/division shows a synthesized unit, like "10 mL ÷ 2 kg = 5 mL/kg" - Define your own custom units, like "1 gold coin = 17 silver coins, 1 silver coin = 23 copper coins" - Three themes: Light, Dark, and follow system setting - A focused, uncluttered interface -- no extra features to get in your way
DELTAMin
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Creating a truly valuable product like DELTAMin requires a long-term commitment to understanding and addressing user needs. We remain focused on the real-world user experience, striving to refine our product capabilities so that technology and design genuinely serve users' daily requirements. DELTAMin is a user-oriented management application that organizes its features around the relationships between tools, tasks, and costs. Users can configure parameters—such as pricing, cycles, capabilities, and format constraints—and verify coverage. The app supports task management, usage timing, frequency tracking, and payment logging, while visualizing resource allocation and cost fluctuations through coverage matrices, bar charts, line graphs, and donut charts. A comparative analysis feature combines weighted set coverage, functional similarity, and constraint-based search to retain essential tools and identify functional gaps; a conditional analysis tool allows for the simulation of changes in pricing and demand. We believe that a great product is not created in a single step but evolves through continuous usage and feedback. User questions, suggestions, and real-world experiences are vital drivers of product improvement. We carefully analyze every piece of feedback and continuously iterate to ensure the product matures and improves over time.
Screenshots
Verdict
The clearest difference is ads: DELTAMin at none against Instant Unit Calc's shown. Instant Unit Calc's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Instant Unit Calc | DELTAMin |
|---|---|---|
| Price | Free | Free |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 34 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Keisuke Yamakawa | Daniel Cross |
In-app purchases
Instant Unit Calc
No in-app purchases
DELTAMin
No in-app purchases







