DNT vs The Filter List
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DNT
This application connects to a proprietary digital scope via Wi-Fi to provide video preview and management of recorded videos and photos. It also offers ballistic calculation settings and basic digital scope functions like video recording control and zeroing.
- Wi-Fi connection to digital scope
- Video preview
- Video recording control
- Zeroing function
- Recorded video/photo management
- Ballistic calculation settings
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The APP can be used to connect to the our digital scope with Wi-Fi (The digital scope is manufactured by us), and has the following main functions. Video preview Basic digital scope functions, include video recording control and zeroing Recorded video/photo management Ballistic calculation settings Note: The digital scope is a pure optical tool, and our APP only do the calculation parameter settings and data management. It does not control the mechanic motion apart from our digital scope of any sort.
The Filter List
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Never forget a filter again. The Filter List keeps every filter in your life — home and car — in one simple place, and reminds you before each one is due. Track your HVAC furnace filter, refrigerator water filter, under-sink and reverse-osmosis filters, car cabin air, and engine air filters. Add anything custom, too. - See everything sorted by what's due soonest - Get a reminder before a filter is due, and on the due date - One tap to mark a filter replaced — the next due date sets itself - Smart presets fill in sensible replacement intervals for you - Save the replacement part so reordering is effortless - Group filters by location — your home, your car, anywhere - Optional sync — keep your filters the same on every device Sync is set up with a five-word code. No account, no email, nothing to sign up for. It's off unless you turn it on, and the app works exactly the same without it. No account. No subscription. No ads. Simple, clean, and built to stay out of your way until you need it.
Screenshots
Verdict
DNT and The Filter List are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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.
DNT ships an update every 5 weeks, The Filter List every 2 months. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.
| Parameter | DNT | The Filter List |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (33 ratings) — better | — |
| Positive reviews | 31.6% of reviews | — |
| Number of ratings | 33 — better | — |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 25 MB | 43 MB |
| Age rating | 17+ | 4+ |
| Developer | DNT Optics, LLC | Timothy Smith |
In-app purchases
DNT
No in-app purchases
The Filter List
No in-app purchases









