PLD2 vs HFpager
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PLD2
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PLD2 operates the 64seconds Pipeline Leak Detector (PLD) instrument. PLD2 records and analyzes sounds from underground pipelines and contact points, like hydrants, valves, and meters, from the PLD sensing unit (required hardware device). High resolution audio processing allows mobile users to discover and pinpoint pipeline leaks quickly and easily.
HFpager
This utility app enables the exchange of short text messages through audio and radio channels using IFSK modulation. It offers basic reception and transmission functions for free, with a subscription unlocking all features and removing ads.
- IFSK modulation for audio messaging
- Send and receive short text messages
- Utilizes audio and radio channels
- Basic functions free
- Subscription removes restrictions and ads
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The program is designed to generate and receive an audio signal using IFSK (Incremental Frequency Shift Keying) modulation. Used to exchange short text messages via any audio and / or radio channel. For a detailed description, see the project website https://nvis.club/hfproxys/hfpager/hf-pager Basic functions work without a subscription: reception / transmission. With a subscription, all restrictions are removed and there is no advertising. Privacy Policy and User Agreement: https://ildd.ru/bi/hfpager/hfpager_politica/
Screenshots
Verdict
The clearest difference is in-app purchases: PLD2 at none against HFpager's 1. PLD2 also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price, 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
Both are free to download. HFpager sells 1 in-app purchase, starting at $9.99 per year. PLD2 asks for nothing beyond the download.
PLD2 ships an update every 3 weeks, HFpager every 3 months. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.
| Parameter | PLD2 | HFpager |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Positive reviews | — | 71.4% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 20 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | 64seconds, Inc. | Dmitry Likhtarov |
In-app purchases
PLD2
No in-app purchases
HFpager
- Подписка 12 месяцев7 Days trial$9.991 Year
