Pass 2 vs Aquadex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pass 2
A quick and convenient note-taking application that offers secure storage and easy retrieval of your entries. It supports scanning codes and rich text editing for enhanced note creation.
- Quick and convenient note-taking
- Secure storage and easy viewing
- Supports code scanning for notes
- Rich text editing
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Pass - 方便快捷记录笔记 功能: √ 方便快捷,想记就记 √ 安全存储,方便查看 √ 支持扫码记录 √ 富文体编辑支持
Aquadex
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AquariumLog is a professional aquarium parameter management system designed for hobbyists who treat fishkeeping as a science. PARAMETER TRACKING • 6-parameter water test log: pH, NH3 (ammonia), NO2 (nitrite), NO3 (nitrate), temperature, salinity • Threshold-based status engine — automatic safe / warning / danger classification per parameter • Per-tank historical record with reverse-chronological access ANALYTICS • pH trend chart with ideal-line overlay (7.0 reference) • Nitrogen cycle chart — ammonia, nitrite, nitrate plotted together • Temperature chart with ideal range (78°F) • Days-running counter, test count, care log count, fish census CARE WORKFLOW 9 care types: water change (with gallons logged), feeding (with food type), filter cleaning, glass cleaning, gravel vacuum, equipment check, algae removal, plant trimming, other. TANK & LIVESTOCK MANAGEMENT • 7 tank type presets — freshwater, saltwater, brackish, planted, betta, goldfish, cichlid • Capacity tracking in gallons • Fish & invertebrate inventory with name, species, date added, alive/deceased status • Per-tank notes DATA OWNERSHIP • Built on SwiftData (Apple native persistence) • 100% on-device storage — no cloud sync, no account, no telemetry • One-tap JSON export of all tanks, tests, logs and livestock • Zero network calls, zero third-party SDKs PLATFORM • iOS 17+ / iPhone-only • Native SwiftUI, optimized for the latest iPhones • Built-in iOS Charts framework If you keep precise records, run controlled water changes, and want to see your nitrogen cycle in graphs — this is your tool.
Screenshots
Verdict
The clearest difference is iOS requirement: Pass 2 at 15 against Aquadex's 17.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Pass 2 | Aquadex |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15 — better | 17.0 |
| Further details — not scored | ||
| Size | 18 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | ShenZhen Yuyue Technology Co., Ltd. | 旭 王 |
In-app purchases
Pass 2
No in-app purchases
Aquadex
No in-app purchases









