Idle vs CoilCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Idle
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Idle is a chat app built around widgets that lets your group chat do more than just talk. Because every group is different, so is every chat on Idle. Your rec softball team can add a calendar widget and a roster tracker. Your small business might need a shared Todo list widget or a place to share links. Your book club can create a poll or write in a shared notepad. And your neighborhood group can make announcements and add events to the board. In Idle, you never get features you didn’t ask for and you’re never missing the ones you need. WIDGES FOR ANY GROUP Every group has unique needs so only add the widgets that you need [Calendar] - Meetups, games, and sessions everyone can see at a glance [Events]- Post events with details and RSVPs so nothing slips through [Signup Sheets] - Keep tabs on attendance, scores, signups, or progress [Notepad]- Shared notes, lists, and agendas the whole group can edit [Paid Memberships] - Collect dues, fees, or contributions right inside the group [Polls] - Vote on the next book, the next date, the next anything [Announcements] - Pin the things that matter so they don't get buried New widgets are added regularly, so there's always more to choose from. CREATE YOUR OWN Need something that’s not off the shelf? Create your own custom one made just for your group. If your group has a need, your chat can meet it. SET THE VIBE Make the space feel like your group with custom wallpapers, your own emojis, and name tags. Idle Chat should feel like being in a friends’ living room, not the JPMorgan office. Terms: https://idlechat.app/terms Privacy: https://idlechat.app/privacy
CoilCalc
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CoilCalc is a precise and intuitive tool for calculating technical coil and wire parameters. The app helps users determine accurate values for resistance, current, power output and coil length based on material type, wire gauge, diameter settings and wrap count. Designed for engineering tasks, educational environments and technical projects, CoilCalc provides clear results through a modern and easy to use interface. All calculations are processed instantly, making it an efficient tool for anyone working with coil geometry, wire characteristics or electrical values. Key Features • Accurate calculations for resistance, current, power and coil length • Supports multiple coil configurations such as single, dual and quad • Adjustable parameters for material, wire gauge, inner and outer diameter and wrap count • Instant results for technical and educational use • Clean and modern interface designed for clarity and speed • Built in formulas and explanations to help users understand the calculations • Fully localized in English and German • Works offline and requires no account CoilCalc offers a reliable and accessible way to perform coil and wire calculations, making it useful for training, engineering work and personal technical projects.
Screenshots
Verdict
Idle and CoilCalc are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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 | Idle | CoilCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 — better | 26.1 |
| Further details — not scored | ||
| Size | 112 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Synthetic Solutions, Inc. | VortexCom UG (haftungsbeschränkt) |
In-app purchases
Idle
No in-app purchases
CoilCalc
No in-app purchases









