Aqua_Smart vs One Country
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Aqua_Smart
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Supports aquarium maintenance. You can name and manage up to 10 aquariums. Displays the time to change the water, the time to clean the filter, and the quality of water (pH, TDS, NH3, etc.). Quality criteria can be set individually for each aquarium. Results can be sent by e-mail after maintenance. After learning how to use it, you can also enjoy a slideshow with your aquarium photos. Items that can be managed are as follows. - Filter maintenance: date and time, elapsed days, two-stage alarm - Water exchange: date and time, elapsed days, two-stage alarm - PH: Measurement date and time, measured value, lower limit, upper limit - TDS: Measurement date and time, measurement value, 2 levels of alarm level - NH3: Measurement date and time, measurement value, 2 levels of alarm level - HNO2: Measurement date and time, measurement value, 2 levels of alarm level - HNO3: Measurement date and time, measurement value, 2 levels of alarm level - launch: date and time, elapsed days, memo 1, memo 2 - Reserve 1-3: Date and time, elapsed days, memo 1, memo 2 - Reserve 1-3 (with alarm): Date and time, number of days elapsed, memo 1, number of alarm days - Aquarium volume calculation: width, depth, height - Salt bath salt content calculation: salt content, aquarium volume, salt concentration - Calculation of medicinal bath dosage: dosage, aquarium volume, instruction hydrological quantity, instruction dosage
One Country
Access exclusive content, enter giveaways, and stream ad-free radio. This app offers behind-the-scenes artist access and supports charitable causes.
- Massive giveaways
- Exclusive content
- Ad-free radio streaming
- Track and move entries
- Behind-the-scenes access
- Community support for causes
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Country’s All-Access Pass Unlock the ultimate fan experience with massive giveaways, exclusive content, tickets to the hottest shows, and more—all in one place. Track & Move Your Entries See all your active entries and shift them toward the prizes you want most. Stream One Country Radio Ad Free From today’s hits to deep cuts. It’s your ultimate playlist loaded with in-app perks and bonuses. Exclusive Content Watch original video series, listen to podcasts, and get behind the scenes access to the artists you love. Give Back with Us Be part of a community that celebrates generosity, shines a light on real stories, and supports causes across the country. Download the app. Join the One Country community.
Screenshots
Verdict
The clearest difference is price: One Country at Free against Aqua_Smart's $2.99. Aqua_Smart's advantage is iOS requirement (12.0 vs 15.1). On update cadence, ads, in-app purchases 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
One Country is free to download; Aqua_Smart costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Aqua_Smart ships an update every 2 months, One Country monthly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Aqua_Smart | One Country |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 4.8 (2.3K ratings) — better |
| Positive reviews | — | 54.2% of reviews |
| Number of ratings | — | 2.3K — better |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 38 MB | 41 MB |
| Age rating | 4+ | 17+ |
| Developer | kazunori ueda | OC Media Holdings LLC |
Bugs and requests
Aqua_Smart
Not enough reviews yet to summarise bugs or requests.
One Country
Reported bugs
3 issues- Inability to access app due to login issues
- Crashes and freezes during use
- Inconsistent app behavior across devices
Requested features
3 requests- Add phone support for customer service
- Improve account management options
- Enhance mobile app functionality
In-app purchases
Aqua_Smart
No in-app purchases
One Country
No in-app purchases









