OpticLingo vs Unterra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpticLingo
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LensLingo is your travel translation companion. Point your camera at signs and menus, speak naturally, or type text and get fast translations between the languages you choose. Camera - Drag to select text, then Capture - Import photos, PDFs, and text files - Detect language automatically Voice & Write - Tap the mic, speak, tap again to translate between any two languages - Type with live translation as you write Conversation - Two-way mode for you and a partner - Optional group mode for three languages More - Travel phrasebook and emergency phrases - Home Screen and Lock Screen widgets - Share extension for text and images - On-device learning from your corrections (iOS 18+ where available) Free tier includes tries per language. Subscriptions may be offered in future updates.
Unterra
This app creates a personal map of your real-world travels, revealing fog as you explore new streets, cities, and countries. Track your progress, earn badges for milestones, and customize your exploration experience.
- Personalized exploration map
- Fog reveals as you travel
- Tracks roads, cities, states, and countries
- Earn badges for exploration milestones
- Customizable reveal radius
- Metric and imperial units
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Explore Your World Every road you've traveled. Every city you've wandered. Every country you've set foot in. Unterra turns your real-world adventures into a living map, covered in fog that only you can lift. As you move through the world, the cover clears. Watch your personal exploration map grow with every new street, neighborhood, and city you discover. Unterra runs quietly in the background so no adventure goes unrecorded. How It Works Open the app and your map is cloaked in fog. As you travel on foot, by bike, by car, the cover lifts around you, permanently revealing everywhere you've been. Over time, your map becomes a record of your entire life's movement. Track Everything - Roads, streets, and thoroughfares you've traveled - Cities and what percentage of each you've explored - Countries visited, with area explored in km² or mi² Earn Badges Hit milestones as you explore from your first 10 roads to 100 cities, from crossing 2 countries to covering 75% of a city. Badges celebrate how far you've come and motivate you to go further. Make It Yours Set your reveal radius a tighter beam for detailed urban exploration or a wider sweep for road trips. Switch between metric and imperial. Personalize your profile with a photo or emoji avatar. Unterra Pro - $14.99/year - Detailed stats: cities, countries, states, roads, and area explored - City coverage breakdowns with progress bars - Full badge collection - Profile with custom avatar - Trips, track and tag trips ex: Hike, Road Trip, Run For wherever life takes you Terms of use EULA https://policy.unterra.app/eula
Screenshots
Verdict
The clearest difference is in-app purchases: OpticLingo at none against Unterra's 3. Unterra's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads, 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. Unterra sells 3 in-app purchases, starting at $1.99 per month. OpticLingo asks for nothing beyond the download.
OpticLingo ships an update every 3 weeks, Unterra every 4 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | OpticLingo | Unterra |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (3 ratings) — better |
| Positive reviews | — | 16.7% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 10 MB | 58 MB |
| Age rating | 4+ | 12+ |
| Developer | Umar Muzaffar | NPDesigned LLC |
In-app purchases
OpticLingo
No in-app purchases
Unterra
- Unterra Pro - Monthly$1.991 Month
- Unterra Pro$14.991 Year
- Unterra Pro - Lifetime$49.99









