Deep Time Walk vs Last Second Language
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Time Walk
Experience Earth's 4.6 billion-year history through an immersive walking audio tour. Learn about major evolutionary milestones and human impact, with a glossary and mobility-assist option. Connect with nature and discover pathways for positive environmental action.
- 4.6km walking audio history
- 4.6 billion years of Earth's evolution
- Key geological and biological concepts
- Human impact and interconnectedness
- Time-contextual glossary
- Mobility-assist mode
- Positive action portal
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Every metre you walk is one million years of Earth's history. Deep Time Walk turns the planet's 4.6-billion-year history into a guided audio walk. Set off, and GPS paces the narration to your own steps - 4.6 kilometres, 4,600 million years, from the molten beginning to the web of life that surround you. You walk it in company. The included "A Fool and a Scientist" narrative is a dramatised audio production. One character reaches for poetry, the other for evidence, and both circle the same question: how did a ball of hot rock become a living world? This initial Deep Time Walk narrative is directed by Jeremy Mortimer (over 200 productions for BBC Radio) and designed by Jo Langton (a BBC Studio Manager), with voices provided by leading actors Paul Hilton (Garrow’s Law, The Bill, Silent Witness), Chipo Chung (Doctor Who, Sherlock, Into the Badlands) and Peter Marinker (Love Actually, Event Horizon, Judge Dredd). The script is written by Peter Oswald (ex-playwright in residence at Shakespeare Globe, London) and Dr Stephan Harding. WHY WALK IT INSTEAD OF READING IT? Being told the Earth is 4.6 billion years old gives you a number. Walking it gives you something a number cannot - and embodied experience. Life appears early and then stays single-celled for well over half the journey. The oxygen you are breathing began as a waste product that poisoned the world that made it. Flowers arrive with a few hundred metres to go. All of recorded human history is the last few millimetres. This closing stretch is why so many people walk this. Deep Time Walk helps you think about what it means to be human today - it embodies just how unusual, and how fragile, the conditions we have inherited actually are. TWO WAYS TO WALK • Walking mode — GPS advances the story as you move, outdoors, at your own pace. • Listening mode — for those not able to walk 4.6km. WHAT YOU GET • Stunning graphics accompanying different chapters in Earth's history from a range of artists • Learn about key concepts from Earth’s long evolution including how Earth formed, the evolution of life, plate tectonics, oxygenic photosynthesis, multicellular life, The Cambrian Explosion, vertebrates, plants, amphibians, mammals, dinosaurs and finally (in the last 20cm) humans. • Around 80 minutes of original audio with an ambient soundscape • An interactive glossary - tap any idea for a plain-English explanation • Complete offline downloads, so you need no signal on the walk itself • Join a Walk - discover small, in-person, facilitator-led group walks happening near you • Background playback, so the story continues with your screen locked Step back in time and experience Earth history like never before. Deep Time Walk is a ground-breaking tool enabling anyone, anywhere to take a walking audio history of our planet.
Last Second Language
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Flying out tomorrow? Last Second Language gets you speaking the essentials before you land. Learn what you'll actually need first: greetings, directions, food, money, transportation, emergencies, and basic conversation. No grammar drills. No streaks. No fluff. Whether it's your first time in Tokyo, Paris, or Lisbon, Last Second Language focuses on practical survival phrases and interactive lessons built for real trips. Learn fast with real audio from native speakers and exercises designed to help phrases stick. How it works Pick your destination language and start a lesson immediately. Five interaction types reinforce every phrase: Flashcard review Multiple choice Tap-the-pair matching Listen and select Arrange the words Free for every language: the Survival Pack Get started with three free sessions covering the phrases travelers need most: Session 1: Greetings and basic courtesy Session 2: Finding your way — bathrooms, banks, asking for help Session 3: Arrival essentials — taxi, hotel, airport, numbers Go deeper with Topic Packs Unlock additional travel-focused modules including: Food & Dining Numbers Transport Hotels Shopping Feelings Emergencies Available languages French • Spanish • Italian • Japanese • Portuguese • Norwegian
Screenshots
Verdict
The clearest difference is in-app purchases: Deep Time Walk at none against Last Second Language's 7. Last Second Language's advantage is iOS requirement (15.1 vs 18.2). On price, update cadence, ads 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. Last Second Language sells 7 one-off in-app purchases. Deep Time Walk asks for nothing beyond the download.
Deep Time Walk ships an update every 5 months, Last Second Language every 3 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Deep Time Walk | Last Second Language |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (33 ratings) — better | — |
| Positive reviews | 92.0% of reviews | — |
| Number of ratings | 33 — better | — |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Deep Time Walk C.I.C. | Jonathan Michael Bruno |
In-app purchases
Deep Time Walk
No in-app purchases
Last Second Language
- French Language Pack$3.99
- Japanese Language Pack$3.99
- Italian Language Pack$3.99
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- Portuguese Language Pack$3.99
- Spanish Language Pack$3.99
- Norwegian Language Pack$3.99
- All Language Packs$9.99
Questions
Is Deep Time Walk free?
Is Last Second Language free?
Do Deep Time Walk or Last Second Language have ads?
Which is updated more often, Deep Time Walk or Last Second Language?
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