IsoCal vs Currently One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IsoCal
This tool helps calculate the sound reduction index for various wall constructions, including single, double, and multi-leaf walls. It offers a catalog of materials and allows users to add their own for designing optimal soundproofing. The app also includes a calculator for predicting absorption coefficients of porous materials.
- Sound reduction index calculation
- Single, double, and multi-leaf wall design
- Material catalog and custom material input
- Porous material absorption coefficient calculator
- Cavity and boundary connection design
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IsoCal is a prediction tool for calculating the sound reduction index of single walls with no cavity and double walls with a cavity between the leafs. It is possible to design walls with multiple leafs and different cavity/boundary connections (rigid connections, steel studs, staggered studs, etc.), different porous sound absorption material in the cavity of a double wall and predict the sound reduction index given as a Rw value in decibels [dB]. IsoCal comes built in with a catalog of well known material and porous material to use for designing the wall for optimal sound reduction. The user can also insert own materials in order to expand own personal database. IsoCal also provides a calculator for the prediction of absorption coefficients of porous materials. A simple calculator that lets the user choose the porous material thickness, air gap behind the porous material and more.
Currently One
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Currently One gives you real-time insights into your electricity consumption and price, to keep you in control of your energy costs. You can clearly see what happens when you turn on and off an electrical device, for example your heat pump or car battery charger. You decide how and with whom you share this data, for example to family members.
Screenshots
Verdict
The clearest difference is price: Currently One at Free against IsoCal's $14.99. Currently One also leads on update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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
Currently One is free to download; IsoCal costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
IsoCal ships an update every 2 months, Currently One every 3 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | IsoCal | Currently One |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 14.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Emil Aerenlund | Telldus Technologies AB |
In-app purchases
IsoCal
No in-app purchases
Currently One
No in-app purchases
Questions
Is IsoCal free?
Is Currently One free?
Do IsoCal or Currently One have ads?
Which is updated more often, IsoCal or Currently One?
Other comparisons
